Bradley Cooper and Michael Fassbender partied until 4am at Glastonbury festival.
The A-list actors stunned revellers with their hard partying on Saturday night (28.06.14) in scenes reminiscent of Bradley's hit movie, 'The Hangover'.
The Oscar-nominated stars partied into the early hours of Sunday morning (29.06.14) in the Shangri La area of Worthy Farm at the music festival after watching a rocking performance by headliners Metallica.
An eyewitness told The Sun newspaper: "The boys were out to enjoy themselves big time. After midnight on Saturday, they made their way to Shangri La and then on to The Rabbit Hole. Revellers couldn't believe their eyes as they were dancing and stayed in for a couple of hours.
"They kept moving when people realised who they were but it was pretty late. Most people were too drunk to care and didn't hassle them too much."
Earlier in the evening, Bradley, 39, was seen among the 100,000-plus crowd enjoying performances by Metallica, Jack White and Lana Del Rey.
The 'American Hustle' star arrived at Worthy Farm in Somerset, South West England on Friday (27.06.14) with his pal, Metallica drummer Lars Ulrich.
Bradley's girlfriend Suki Waterhouse, 22, wasn't by his side at this year's festival.
She wrote on Instagram last week: "#GLASTONBURY reminiscing. So sad I'm not going this year.. rave on beautiful ravers!!!!!! (sic)"

Robin Thicke made a public apology to his estranged wife at the BET Awards last night (29.06.14).
The 37-year-old singer, who split from Paula Patton after nine years of marriage in February, dedicated his performance at the ceremony at the Nokia Theatre L.A. Live to his estranged spouse.
Taking to the stage, he said: "Good evening, my name is Robin Thicke. I'd like to dedicate this song to my wife, and say, 'I miss you, and I'm sorry.' This is called 'Forever Love.' "
At the end of the performance, an old picture of the couple - who have four-year-old son Julian together - flashed up on the big screen with the word 'Paula' written in huge letters above.
The evening's host Chris Rock later mocked the morose tone the 'Blurred Lines' hitmaker's music has taken since he split from his spouse.
He said: "He's singing like she don't know him. I miss the other song, the one that sounded like Marvin Gaye."
Robin has named his forthcoming new album 'Paula' and has admitted every track on the record is inspired by the 38-year-old actress.
He said: "Obviously all the songs were about her or about how I feel about her. A lot of songwriters have done this kind of thing before. They won't tell you in the title or they'll be suggestive...I was just like, 'There's no reason to hide who this is about.' It's all about her."
The couple split following rumours Robin was propositioning other women.
The 'Get Her Back' hitmaker wore his wedding ring to his album launch party in Los Angeles last week (26.06.14), but Paula did not attend.

Dolly Parton has denied miming at Glastonbury.
The 68-year-old singer - who made her festival debut on the Pyramid Stage on Sunday night (29.06.14) - has been forced to defend herself over claims she failed to sing live during the set.
A spokesperson for Dolly told The Sunday Mirror: "She sings live. Some people don't know an amazing singer when they hear one."
The '9 To 5' hitmaker's vocals became the subject of debate following her performance of her hits including 'Islands in the Stream', 'Baby I'm Burning' and 'Jolene' prompting actor Stephen Fry to speak out in her defence.
The 56-year-old wrote on Twitter: "I think I know quite a lot about how TV is made. Why are people saying @DollyParton is miming? She's fooling me."
He added: "Believe me, that is not miming. If it appears not always to lip-sync that's an HD live processor issue. You see it with news reporters."
Meanwhile, Dolly - who performed her energetic set in front of over 200,000 adoring fans clad in a white suit covered in rhinestones - had received a surprise award prior to her set at the iconic Worthy Farm.
She was presented with a congratulatory plaque by Glastonbury organizer Michael Eavis and her manager Danny Nozell at the Somerset event in honor of selling 100 million albums worldwide.
She said after receiving her award: "I've been so busy making records for the past several decades, I didn't realize I had racked up so many sales. What a great honor to know that I have so many fans that have supported me through the years.
"Thanks to the RIAA [Recording Industry Association of America] for the acknowledgment and the plaque. I feel very honored and proud."

Kym Marsh had "deflated balloons" for breasts before having a boob job.
The 'Coronation Street' actress decided to get breast implants in 2009 as she believes her assets lost their shape after she gave birth to her eldest children, David, 19, and Emily, 16.
She explained: "I just wanted to get back what I'd lost after having children so I went from a B to a D cup. I just wanted to feel like my old self again."
However, the 38-year-old star - who also has three-year-old daughter Polly with ex-husband Jamie Lomas - was in incredible pain after surgery as she decided to get two operations done at the same time - both a breast augmentation and liposuction.
She told Britain's OK! magazine: "My boobs were so painful as I had the implants underneath the muscle to give them a natural shape - they actually masked the pain of the lipo!"
Kym was also alarmed by the shape of her implants when she awoke from surgery.
She recalled: "I was told when I woke up they wouldn't be the shape they would end up like. Thank God they told me that! I woke up and I looked like Madonna when she was wearing that conical bra. I thought they were horrible."

Jonathan Ross would only have Kim Kardashian on his talk show if it was a "quiet week".
The 'Jonathan Ross Show' host has admitted he isn't quite sure what the Kardashian family do for a living and would prioritise other guests over them - but he'd be happy to have Kim's rapper husband Kanye West on for a chat.
He explained: "I've had Kanye on and I'd probably have Kim. The Kardashians are a remarkable phenomenon, but it is still quite hard to work out what they actually do.
"I would probably bear in mind that I don't do as many shows per year as I used to [on BBC], so unless it was a very quiet week, I might not want to go with the Kardashians. I'd maybe still go with Kanye."
Despite admitting the Kardashian clan isn't at the top of his celebrity wish list, he did confess that he's a fan of their comedic value, but isn't sure they're trying to be funny.
Jonathan told heat magazine: "I do find them very funny - I mean 'Bound 2' [Kanye's music video featuring a topless Kim] was f***ing hilarious.
"It's difficult to work out whether they're in on their own joke."

Leona Lewis has vowed to "work really hard" at acting.
The 'Bleeding Love' singer - who stars in the new musical movie 'Walking On Sunshine' - has promised to devote herself to her new craft and wants to work as hard as her actor pals to get parts.
She told The Sunday Express' S magazine: "I don't want it to be like, 'Oh, she's a musician and she's a bit famous so that's why she got the part.
"I have friends who are actors. They go for millions of auditions and they're having classes all the time, and in no way would I want to take that away from them.
"I want to do the exact same thing and work really hard at it."
Leona, 29 - who shot to fame after winning the 'The X Factor' in 2006 - has defended her decision to try her hand in the film industry.
She told Digital Spy: "People always want to get the claws out straight away, but I feel like this film... was so natural for me.
"It's a musical - they want someone who can sing to be in it."
Meanwhile, the pretty brunette recently left Simon Cowell's SyCo/Sony label - to which she had been signed since the music mogul discovered her on the singing competition - after brokering a new multi-year record deal with Island Records.
Leona has insisted there are no hard feelings between the pair over her move.
She said: "I was offered another deal with Syco but I thought it was time to have a new team with fresh ideas.
"I have spoken to Simon. He is sad I didn't stay with Sony but he is happy for me and proud.
"He has been so supportive and he will continue to be supportive and I can always call him up for advice."

Keira Knightley imagined herself as Al Pacino in 'The Godfather'.
The 'Begin Again' actress was drawn to movies from the 1970s, but growing up she always saw herself as the leading man rather than "his f***ing wife".
She told the Sunday Times newspaper's Culture magazine: "My friend was saying she loved 1970s movies, and we both realised that's because we see ourselves as the main guys in them.
"When I watched 'The Godfather', I was Al Panico. I wasn't his f***king wife. It's interesting that there's still this funny construction of femininity.
"So, yes, it's nice working with women, because then you don't have to do this lovable, soft version of what the female sex has to be. It also allows men to understand women, as opposed to them being something pink and fluffy."
Although she acknowledged some hypocrisy in her decision to then appear on magazine covers, she still insisted that "minorities" needed to be given a voice.
She added: "I think when you recognise it's strange that half the population doesn't have the same voice as the other half, and there's minorities within minorities that don't have a voice and should have, it does make you go, 'Ha. This is interesting' ... I have no idea [what to do].
"I wish I knew. Keep on having conversations and somebody intelligent will go, 'Eureka!' "

Chelsea Handler likes to make one grow man cry every week.
The talk show host described herself as a "big insulter" and insisted she finds it "funny" to "abuse men" only to watch them come back anyway.
She told the Sunday Times newspaper's Culture magazine: "OK, yeah, I'm a big insulter. The more you abuse men, the more they come back. It's funny to watch.
"Then I realise I've taken it too far, because the person I'm insulting is about to cry. It's quite easy to make a grown man cry twice in one day, so I like to stick to once a week."
While some might consider it a cruel tactic in the name of comedy, the 'Chelsea Lately' presenter explained she quickly learnt that "everything is material" after telling other drink-driving offenders about her own arrest.
She added: "I started in stand-up when I told my drunk-driving arrest story to a class of other offenders, and they suggested I do comedy. After that I realised, everything is material."
Even friends and their personal stories - without changing their identities - made it into her book 'Chelsea Handler: Uganda Be Kidding Me'.
She revealed: "My girlfriend Hannah didn't speak to me for the first two months after the book was out because I told the truth of what happened in Africa. She was taking doxycycline, hallucinating and thinking the safari guides were going to rape us.
"First of all, I told her, if they're going to rape us, they're not going to do it the day we arrive. She asked me to change her name and I forgot. When she rang, I said, 'No one will connect the dots that you're the Hannah I'm friends with. No one knows who you are, don't worry about it.'
"She said, 'There are photos of me in the book that say 'Hannah' underneath them. I said, 'You know what? This is a bad connection. We'll talk gain in about two months' time.' "

Iggy Azalea says fellow rappers like Kanye West have no problem with her style
The Australian star has been criticised by some fans of the genre for not being authentic - her rhyming voice is different to her speaking one - but she insisted none of her contemporaries could have foreseen the abuse she has received.
She said: "It would have been hard for [Kanye West] to fathom that anyone would want to have such a conversation with me.
"He is embedded in this world, he is not looking in on it from the outside.
"You know, I just read the Keith Richards autobiography and I thought it was so interesting when he pointed out that no American blues musicians ever accused the Rolling Stones of "imitating" their sound - but people were writing that stuff about them back in England."
Iggy has come under similar criticism, and she has pointed out that - in the exact same way - it hasn't been her fellow musicians who have been the ones attacking her.
She told The Observer newspaper's New Review: "You know the funny thing, I have never had any musician tell me that I wasn't authentic for being white and Australian. Not one.
"Even I had a warped perception of how I would be received in this business.
"What I've come to realise is that it's the people who write about the music - or who are outside it in some way - who have a problem with what I am doing. The only true insiders are the musicians themselves."

Jennifer Garner has reportedly "never understood" Ben Affleck's obsession with gambling.
The 41-year-old actor was reportedly banned from playing blackjack at the Hard Rock Hotel & Casino in Las Vegas in April after he was caught counting cards and, although his spouse hates seeing negative things about him in the press, Jennifer is determined to support him the whole way.
A source told PEOPLE.com: "She never understood his gambling obsession and she doesn't want him to be in the news [for it], [but] she's the most patient wife ever and is still very much in love with Ben."
Meanwhile, the 42-year-old actress flew to Detroit in Michigan, where the Hollywood hunk is filming his new movie 'Batman vs. Superman', this weekend to celebrate nine years of marriage together.
Ben reportedly bought his gorgeous wife some expensive jewellery from Barneys in Beverly Hills last week to mark their wedding anniversary.
Meanwhile, prior to jetting to Detroit, Jennifer and her three children Violet, eight, Seraphina, five, and Samuel, two - who she has with Ben - paid a visit to Charleston in West Virginia to see her family.
The brunette beauty was spotted watching a minor league baseball game with her parents, sister, and three children, on Friday (27.06.14), before sending her kids back to Los Angeles with their nannies.

Lamar Odom is reportedly "jealous" of Khloé Kardashian's new relationship with French Montana.
The reality TV star, who filed for divorce from Lamar in December after four years of marriage, spent her 30th birthday on Friday (27.06.14) in the company of her beau, but her ex-husband isn't happy about her new romance.
A source told the HollywoodLife.com: "While he wants nothing but for Khloé to be happy, he's jealous he wasn't there with her. He hates the fact she's with another man.
"He hasn't really come to grips that she's in what seems to be a real and committed relationship. It would be one thing if she and Montana were casually dating but this sh*t is for real and he's kinda p***ed."
The 'Keeping Up With the Kardashians' star was smitten with the 29-year-old rapper as they celebrated her milestone on a luxury yacht in New York with her family.
French - whose real name is Karim Kharbouch - saw it as an opportunity to spoil Khloé with over a $100,000 worth of gifts, including a $10,000 diamond gold grill, a $49,000 white Jeep and a $25,000 diamond ring.
Meanwhile, Khloé was left devastated last year when rumours emerged the sportsman was addicted cocaine and had allegedly cheated on her multiple times.
The former couple's divorce is yet to be finalised.

Sir Elton John believes Jesus would have been a supporter of same-sex marriage.
The 67-year-old singer, who is planning to marry his civil partner David Furnish next year, claims the Christian figure would have approved of gay members of the clergy if he was alive today because he was "all about love."
Speaking in an interview with Sky News, he said: "If Jesus Christ was alive today, I cannot see him, as the Christian person that he was and the great person that he was, saying this could not happen.
"He was all about love and compassion and forgiveness and trying to bring people together and that's what the church should be about."
The 'Your Song' hitmaker - who raises children Zachary, three, and Elijah, 20 months, with David - believes the church deserves praise for making progress over the last few years, but thinks there's still a way to go until the religious beliefs are more accepting of gay rights.
He said: "As long as I'm alive I will fight for people's rights."
Sir Elton is also planning to meet with Russian president Vladimir Putin during his next visit to the country, where he previously said "vicious homophobia has been legitimised", later this year.
He said: "I'm going to Russia in November, and I will try and meet Putin and I will try to talk to him. I don't know what good it will do. But unless you build a bridge - it's no good putting up a wall and saying I'm not talking to these people. The only thing that gets solved is by talking to people."