Ben Affleck claims his penis "looks better in 3D".
The 42-year-old actor has a "brief" nude scene in his new movie 'Gone Girl' but he joked fans would have a better time if they were able to see a deluxe screening of the thriller.
He said: "I think there's some brief nudity in this movie
"Director David [Fincher] said to me from the beginning, 'This is a warts and all movie. It can have no vanity. You have to see the naked underbelly of this character. It's gotta be like in Europe, they just don't give a s**t about any of that stuff and they just play real people'... [So] there is some brief, very brief nudity, I think.
"The penis is in there! It's IMAX penis! You've gotta pay fifteen bucks to see it in 3D ... it's better in 3D."
However, Ben - who has three children, Violet, eight, Seraphina, five, and Samuel, two, with wife Jennifer Garner - jokingly warned fans not to expect too much when he bares all.
He quipped to MTV News: "You should know it was very cold.
"It was a very cold set. It was freezing. It was sub-zero."
The 'Argo' star may be going nude for the first time in 'Gone Girl' but he claims it is a long-held ambition to get naked on screen.
He said: "I try to get it in every movie."

Ed Sheeran once dedicated a song about a crack-addicted prostitute to David Cameron at a house party.
The 23-year-old singer paid tribute to the British Prime Minister by performing his 2011 hit 'The A Team' - which was inspired by a drug addict after the star visited a homeless shelter - while playing a gig at a guy's home.
Speaking at an #AmazonFrontRow Q&A in central London yesterday (30.09.14), he said: "I met David Cameron really randomly, and it wasn't in a meet and greet situation in 10 Downing Street.
"I was doing this gig at a guy's house and he turned up, fair play.
"But they stopped the gig and, in this very intimate environment, he was like, 'I'm so happy that you are here Ed, and obviously David Cameron is here, so would you like to dedicate something to him?'
"But all I had left to sing was 'The A Team' so I had to dedicate that to him. That was interesting."
As well as rubbing shoulders with the politician, Ed is very good friends with singing sensation Taylor Swift and admitted he has attempted to set her up with some of his pals on many occasions.
Ed - who is good friends with Taylor's ex Harry Styles - added: "I have tried to set Taylor up with a few of my friends. I have a lot of good looking friends."
Ed Sheeran performed live for customers at the #AmazonFrontRow event at the Amazon London office roof top. For more information on Amazon Music visit www.amazon.co.uk/music

Anne Hathaway was "f***ed up" by fame.
The 'Les Miserables' actress was left "stressed out" by her Hollywood success as she had no idea how to cope with life in the public eye.
She told the new issue of Britain's Elle magazine: "This fame thing? F***ed me up for a really long time.
"I didn't know how to do it; I didn't know how to engage with it; it stressed me out. And people would say, 'You just have to be yourself,' and I was like, 'But I don't know who that is yet!' "
Anne - who is married to Adam Shulman - has now learned she doesn't need validation from anyone but herself and says that knowledge has made her life much easier.
She said: "I've realised that don't need validation from anybody. At all. I'm not sitting here now worrying, 'What do you think of me?'
"And that's so liberating. It's a big reveal, man."
The 31-year-old actress can next be seen in 'Interstellar' and learned some valuable lessons from co-star Matthew McConaughey.
She said: "The man speaks in poetry. I remember once while we were filming, something got screwed up, and he said to me: 'Look, we can get upset about this, or we can go with it and have a great story for the rest of our lives.'"

Amal Alamuddin says her wedding to George Clooney was "romantic and elegant".
The 36-year-old lawyer tied the knot to the Hollywood hunk in Venice, Italy, on Saturday (27.09.14) and she has heaped praise on her wedding dress designer Oscar de la Renta for helping to make her big day extra special by creating a custom-made French lace gown.
Speaking to Vogue magazine, she said: "George and I wanted a wedding that was romantic and elegant, and I can't imagine anyone more able than Oscar to capture this mood in a dress.
"Meeting him made the design process all the more magical, as he is so warm and such a gentleman."
The 82-year-old designer worked closely with Amal to ensure he designed the exact dress she wanted and hopes he made her dreams a reality.
He added: "It's the most important dress in the life of a woman.
"Any girl from any walk of life dreams of that special dress, and I try to make that dream a reality for her.
"Amal and I looked at a lot of evening dresses and wedding dresses together, and we discussed what she liked. That gave me the idea of what she wanted."
George, 53, and Amal exchanged traditional vows followed by a lengthy kiss as they married at the historic Aman Canal Grande hotel.
The happy couple's nuptials were part of a three-day celebration which began on Friday (26.09.14) with bachelor and bachelorette parties and concluded on Monday (29.09.14) with a civil ceremony at Palazzo Ca'Loredan, an official council building in the city, to legally marry in accordance with Italian laws.

Gillian Anderson believes therapy kept her alive.
The 46-year-old actress sought help from a counsellor when she was a teenager and says her experiences kept her "sane" and taught her the importance of working through problems.
She said: "[Therapy] kept me sane and alive. I seriously needed it. I'm not going to get into details... But I find that it's important to work things through as much as possible. To not run, and to try as much as possible to develop healthy responses to things."
Three years ago, the former 'X Files' star was left devastated when her brother Aaron - who suffered from genetic disorder Neurofibromatosis - passed away and she says his death made her change her priorities.
She told the new issue of Red magazine: "[His death] had a profound effect on all of us. He was just extraordinary. He made it a lot easier for all of us... It did make me change priorities and realise life is short. And that it's important to follow one's heart, I think, and make the most out of the time we have."
And one way the actress has changed is in raising her family.
Gillian gave birth to her and then-husband Clyde Klotz's daughter Piper in 1994 soon after starting on 'The X Files' and took very little maternity leave and lived "practically on set in a trailer with very little time off", but since having her sons Oscar, eight, and Felix, six, with former boyfriend Mark Griffiths, she makes sure their routine is incorporated into her work schedule.
She said: "I very deliberately make decisions about work. I'm quite adamant about it in terms of working out schedules, pre-agreeing 100% to do something, because there's only so much time I'll be away [from home]."

Miley Cyrus convinced her brother to get more tattoos minutes after he insisted he had "ruined" his body by covering it in inkings.
The 21-year-old star took to her Twitter account to cheer her sibling Trace Cyrus up after he branded himself an "idiot" for getting so many "stupid tattoos" all over his body and discouraged his 623,000 followers from doing the same.
The Metro Station guitarist - who has inkings covering his whole torso and arms - wrote: "So sad I ruined my body with all these stupid tattoos I'm going to look so stupid when I'm old. I'm such an idiot. Don't get tattoos. (sic)"
The 25-year-old singer then posted a picture of his tattoo-covered chest complete with three crying face emoticons.
But Miley soon came to the rescue by taking to Twitter to tell her brother he was talking nonsense and tempt him into getting even more tattoos.
She wrote: "wtf?!?! You're the coolest lookin dude I know! Don't say dat!!!! #lezgettattedwhenimhome (sic)"
The singer's powers of persuasion seemed to work as Trace had a change of heart about tattoos, admitting to his half-sister he was quite keen to add to his collection of inkings.
He wrote back: "haha u know I'm down for more tatts (sic)"

Gregg Wallace was surprised at how tough 'Strictly Come Dancing' training has been.
The 'MasterChef' judge is paired with professional dancer Aliona Vilani on the show and she ensures he works hard during every rehearsal.
He told OK! magazine: "It's tough. I never realised how difficult it really is. Every step has to be right and Aliona is determined for me to learn the basic steps and get them absolutely right before we go to the next level.
"Aliona is amazing. She's not strict but she is expectant. She expects a certain level of behaviour. I know exactly where I stand. There's no messing around.
"I'm not a gifted dancer but I am a grafter and I'm throwing myself into the show. I've even asked my PA to put half-hour slots in throughout the day for me to practise on my own."
Despite the hard work, the 49-year-old star feels "honoured" to have a place in the competition.
He added: "I really love dancing. I'm the guy who's always the first on the dancefloor. It's such a big show and I thought it'd be a real honour to go on it. Now I've said yes, it's starting to dawn on me how grand it is. I'm feeling the pressure now."

Angela Griffin wants to return to 'Coronation Street'.
The 38-year-old actress played hairdresser Fiona Middleton from 1992 to 1998 and would love to see a plot that would have all of Steve McDonald's [Simon Gregson] former love interests return to Weatherfield.
Asked if she would go back to the soap, she said: "Yeah, I think all Steve McDonald's women should come back one by one. I think Fiona would have had a baby by him so I'd come back with this 18-year-old child he'd never met."
Angela - who has children Tallulah, 10, and Melissa, seven, with husband Jason Milligan - admitted she lost a lot of confidence after struggling to find work last year, but is delighted to have landed a role as DS Lizzie Maddox in crime drama 'Lewis'.
She told Closer magazine: "I was out of work for a year from 2012 to 2013 and I hated it.
"It really knocked my confidence. It was hard though I did get to spend loads of time with the kids. Eventually, I made my West End debut in 'One Man, Two Guvnors' [last September] and then 'Lewis' came along and now my career's where I want it."

Dermot O'Leary claims Louis Walsh is the dirtiest 'X Factor' judge.
The 41-year-old presenter - who has hosted the ITV singing competition since 2007- has revealed that Louis, 62, is the most ruthless member of the judging panel ahead of his co-stars former Spice Girl Mel B, Cheryl Fernandez-Versini and even the show's boss Simon Cowell.
According to Dermot, the entertainment manager often resorts to unsavoury tactics in a bid to win the show.
He told The Sun newspaper: "I love it when the panel is fun and when they are a bit spikey with each other, so long as they don't resort to the proper dirty stuff like Louis does.
"If I was a contestant, Louis would be the judge I'd want because when we go to the studios he is the dirtiest judge we have."
However, Dermot insists Louis' "unorthodox" antics make him the most "valuable" judge as his "unconventional" mentoring methods keep the show interesting.
He explained: "He's unorthodox and unconventional but I couldn't make the show without Louis.
"I adore him."In many ways he's the most valuable person on the panel. I can always rely on him to give me a tiny bit of insanity.
"He laughs when everyone else cries and cries when they laugh. He walks to the beat of his own drum. He's an extraordinary man."

'EastEnders' bosses will reveal the identity of Lucy Beale's killer during a live episode to mark the soap's 30th anniversary.
The BBC One show first aired on 19 February, 1985 and to celebrate 30 years on air, 'EastEnders' has announced there will be a week of live episodes, starting from 16 February, 2015. The excitement doesn't stop there though, as the live episodes will conclude with the revelation of who murdered Lucy Beale (played by Hetti Bywater), who was dramatically killed in April.
Charlotte Moore, Controller of BBC One, said: "BBC One will bring the nation together to celebrate 30 years of EastEnders by going live across the anniversary week. Next February will mark a massive event on the channel by creating the ultimate 'doof doof' and finally reveal who killed Lucy Beale."
Ben Stephenson, Controller of Drama Commissioning, also added: "'Live week' allows us to keep loads of secrets from the cast, crew and the audience until the very last minute.
"With shocking reveals and un-guessable twists it's going to be a week that will change Albert Square forever."
This isn't the first time 'EastEnders' has attempted to 'go live' for the show. In 2010 the cast celebrated the soap's 25th anniversary with a live episode and during the 2012 London Olympics the cast and crew shot several live segments.

Josie Cunningham could be set to star in 'I'm a Celebrity... Get Me Out of Here!' - just weeks after giving birth.
The controversial glamour girl is reportedly in talks with ITV to go into the jungle, despite the fact she only gave birth to her daughter on Monday (29.09.14).
Josie found herself hitting the headlines back in March 2013, after it was revealed that she had used the NHS to fund her breast enlargement operation. She then angered the nation after she admitted she had considered having an abortion because it would improve her chances of appearing on the Channel 5 reality show, 'Big Brother'. Although she changed her mind, the 24-year-old mother of three continued to infuriate people as she confessed to smoking and drinking throughout her pregnancy.
However, a source has revealed the Leeds-born brunette hopes an appearance on 'I'm A Celeb...' - which is scheduled to start in November - could show the British public the 'real' Josie.
Talking to The Sun newspaper, the insider said: "She hopes that by doing Bushtucker Trials - which she expects - the nation will see a different side to her and like her. It's hard. She wants to be with her kids and keep a low-profile. But she could earn more than £100,000."

'EastEnders' star Danny Dyer cried tears of pride as he watched his
daughter pose for photographers at the screening of her new film.
The actor and his long-term partner Joanne Mas joined their actress daughter Dani at the premiere of crime drama 'We Still Kill The Old Way' at the Ham Yard Hotel in London on Monday night (29.09.14) and as Danny let the 18 year old take her moment in the spotlight he couldn't contain his emotions.
An onlooker said: "Dani was really nervous before arriving at the event, but her dad walked her through everything and showed her the ropes. "He couldn't hide his excitement at seeing his daughter follow in his footsteps. At one point he and Joanne were cheering and clapping but then he broke down into tears and the film's producer Jonathan Sothcott had to run and get him some tissues."
In the hard-hitting movie, Dani's alter-ego gets involved with a gang of hoodies which results in her being raped by the character played by actor Danny-Boy Hatchard - who portrays Danny's on-screen son Lee Carter in 'EastEnders'. An event that brings a firm of old-time gangsters out retirement to clean up the streets of their old patch.
Danny - who plays Queen Vic landlord Mick Carter in the BBC One soap - admits it was hard to watch his daughter in such a traumatic scene but is very proud of her performance.
Danny, 37, said: "She was absolutely amazing, I'm so proud of her. She's a chip off the old block, but she's just done her first lead role and she didn't ask her dad for one bit of advice through the whole thing."
Referring to the rape scene, he said: "Watching that ain't easy, let me tell you. I wanted to put Danny-Boy's throat into the wall when I saw that, but he's a good kid and a bloody good actor so I eased up and I'll have a beer with him. They've all done great."
Producer Sothcott - Danny's most prolific on-screen collaborator and the man who gave his daughter her first role, opposite her dad in movie 'Vendetta' - teased the Walfrord resident. claiming his time as a big screen hardman is up.
He joked: "We don't need you any more. Danny. You're finished! We've got the next generation now."
Other celebrities at the screening included 'Game of Thrones' star Anouska Mond - who stars in the movie - former 'Celebrity Big Brother' housemate Casey Batchelor, Lucy Pinder and Bruce Payne.