Ashton Kutcher repaired a fan's car on Saturday night (05.24.14).
The 'Two and a Half Men' star, whose fiancée Mila Kunis is pregnant with their first child, came to the aid of a group of hikers after their car broke down in the Hollywood Hills in Los Angeles.
The driver told gossip website TMZ.com that his battery died while they were hiking, so they pushed it to a nearby street and began flagging down other cars in a bid to get someone to help them jump-start their vehicle.
The group were stunned when the 36-year-old actor spotted them and pulled over, offering to help.
Ashton told them that he had to drop his passenger, believed to have been 'Black Swan' star Mila, at home first, but quickly returned to the scene to assist them.
The source said that the heartthrob initially struggled to find his own battery, because it was located in the back of his Lexus, but eventually helped them get back on the road.
A member of the group captured a video of the road-side rescue, during which Ashton can be heard laughing and says: "I've never f****ing not been able to find a battery in a car."

Justin Bieber donated $545,000 to AIDS/HIV research this week.
The 20-year-old singer, who is "trying to be a better person" after several brushes with the law in recent months, reportedly shocked his fellow VIP guests, including Leonardo DiCaprio, when he made the generous pledge at the amfAR's 21st Cinema Against AIDS Gala in Antibes, France, on Thursday night (22.05.14).
A source told gossip website TMZ.com that the 'Heartbreaker' hitmaker "stunned" the star-studded crowd, which also included Heidi Klum, John Travolta and Sharon Stone, when he quietly agreed to match another wealthy guest's pledge of more than half a million dollars.
Organisers asked the Canadian star if he was serious about donating such a large amount of money and he quietly said yes, explaining that he felt very inspired to do something good.
'The Wolf of Wall Street' star Leonardo, 39, also raised $1 million at the event by auctioning off a trip to space with him in 2015.
A source previously said that Justin, who was arrested and charged with Driving Under the Influence (DUI), resisting arrest and possessing an invalid driver's licence earlier this year in Miami, is determined to get his life back on track.
The insider said: "He's making more of an effort to hang out with people who are positive influences in his life."

Kylie Jenner and Jaden Smith reportedly went public with their romance this weekend.
The 'Keeping Up with the Kardashians' star and the 'After Earth' actor - who previously insisted they are just good friends - were spotted "making out" at her half-sister Kim Kardashian and Kanye West's wedding on Saturday (24.05.14).
A source told E! News that the 15-year-old actor and the 16-year-old brunette beauty were all over each other at the newlyweds' reception at the Forte di Belvedere in Florence, Italy.
Jaden arrived in the picturesque city alone but returned to Paris with Kylie, her mother Kris Jenner, niece North West, half-sister Khloé Kardashian and sister, Kendall Jenner, via a private jet today (25.05.14).
The couple also spent a few days in the French capital together earlier this week and were seen arriving back at the George V hotel with tubs of Haagen-Dazs ice-cream after Kim and Kanye's extravagant pre-wedding celebration at the Palace of Versailles on Friday night (23.05.14).
An insider told UsMagazine.com that they were laughing and giggling as they entered the lobby together.
The young fashion designer previously insisted Jaden - whose parents are Will and Jada Pinkett Smith - was just one of her "best guy friends" and claimed they were not dating in December.
Kylie was one of the few members of the bridal party granted a plus-one.
Sources previously claimed that Khloé was banned from bringing her new boyfriend, French Montana, and Kim's half-brother Brody Jenner refused to make the trip from Los Angeles because his girlfriend, Kaitlynn Carter, wasn't invited.

Emma Thompson feels very lucky to have a rock solid relationship with Greg Wise.
The 'Saving Mr. Banks' actress, who has daughter Gaia, 14, and adopted son Tindyebwa Agaba, 26, with her husband of nine years, says he is "a great aesthetic pleasure" and admits she can't imagine her life without the actor, whom she met on the set of 'Sense and Sensibility' in 1995.
She said: "He is the only luxury I can't imagine ever being able to give up. Because he can cook, wash up, clean, entertain children, understand maths homework, put up shelves, take them down and put them up elsewhere and repair the little holes left behind, garden with a purpose, drive sensibly but very fast on motorways and lets me get on with my life."
The 55-year-old star recently put her career on hold to spend more time with her family.
She told the MailOnline: "I wanted to spend more time with my family. A year off was my birthday present to myself. I didn't actually act or write. I was just a mum. I taught drama at my daughter's school, cooked meals and had fun."
She added: "I highly recommend others to do the same if they can afford it."
Emma no longer believes that it's possible to always juggle a career and parenthood.
She said: "Sometimes in life you'll have some things, at other times you will have other things. You don't need it all at once, it's not good for you. Motherhood is a full-time job.
"The only way I could have continued working would have been by delegating the running of the home to other people. I never wanted to do this as I find motherhood profoundly enjoyable."

Emma Watson graduated from Brown University today (25.05.14).
The 'Harry Potter' actress, who enrolled in the prestigious Ivy League school in 2009, donned a black gown and cap to receive her English literature degree at a commencement ceremony on the main campus in Providence, Rhode Island.
The 24-year-old actress added some extra glamour to the traditional graduation attire by applying bright red lipstick before sharing a picture of herself looking happy and relaxed on Twitter.
Emma previously praised her classmates for giving her an opportunity to experience life away from the spotlight.
She previously said: "I've never even been asked for an autograph on campus. I threw a party for nearly 100 students and not a single person put a photo on Facebook."
And the brunette beauty also revealed she was planning to get "very drunk" after struggling to balance her education and Hollywood career over the past five years, during which she spent one year studying abroad in Oxford University in England.
In an interview last year, the 'Noah' star said: "People told me it wasn't possible. I kept saying, 'I don't care.' This is what I want. And graduating will, for me, be really symbolic of all of that."
She added: "I will be there. And I will be throwing a huge party. And getting very drunk."
The British star also insisted she is still very ambitious.
She said: "I've got so much left to do and to prove."

Christina Ricci is pregnant.
The 34-year-old actress is expecting her first child with husband James Heerdegen later this summer.
A spokesperson for the 'Casper' star confirmed the news to PEOPLE.com today (25.05.14) after the brunette beauty sent rumours into overdrive when she was spotted strolling through Los Angeles International Airport with a noticeable baby bump on Friday (23.05.14).
Wearing a long black shirt, the petite 'Addams Family' star let her body do the talking and accentuated her growing curves with a tan leather belt around her waist.
The couple tied the knot in an intimate ceremony at Harold Pratt House And Peterson Hall in New York City last October.
Christina, who was previously linked to Chris Evans and Adam Goldberg, met camera technician James on the set of her short-lived TV drama 'Pan Am' in 2011.
The couple's engagement was first speculated in October 2012 when Christina was seen sporting a diamond ring on her left ring finger and the actress finally confirmed the news several months later.
Christina previously revealed that she enjoyed being able to call James her 'fiancé'.
When asked what she enjoyed most about being engaged, she said: "Getting to say 'fiancé' instead of 'boyfriend'. People take you so much more seriously once you start throwing around that word."

Stacy Keibler has jetted off on a romantic babymoon with Jared Pobre.
The 34-year-old star, who is expecting a baby girl with her husband, is enjoying the "perfect" holiday before the arrival of their first child later this year.
The former wrestler proudly showed off her pregnancy beach body in a black string bikini in a photograph on Instagram on Saturday (24.05.14), with the caption: "Sun, sand and serenity - the perfect #babymoon"
The 'Supermarket Superstar' host is clearly eager to soak up as much sun as possible before becoming a mother, as she also enjoyed a trip to St. Barts in the Caribbean for a friend's wedding last month.
Stacy, who split from George Clooney last summer, recently admitted that she never thought she would get married or have children until she met Jared.
She said: "Before we met, both Jared and I had told our parents we didn't think we'd ever get married or have kids, but when you're with the right person, everything changes."
She added: "My epiphany happened shortly after Jared and I started dating and, once we both knew, we didn't hesitate -- I just knew I was ready and that there's no one else in the world I would want to do this with."
The couple tied the knot in a secret ceremony in Mexico in March and Stacy has no doubt Jared will be a good father.
She said: "Jared is the most thoughtful, loving, kind person. I couldn't ask for a better father for my children. Our bond is so strong and special and getting pregnant has made it even more so. It's been so much fun preparing to become new parents together."

Wiz Khalifa was arrested for marijuana possession this morning (25.05.14).
The 26-year-old rapper was detained at an airport in El Paso, Texas, after officers from the Transportation Security Administration (TSA) allegedly found a "green leafy substance" in his luggage before he boarded a flight to Dallas.
A law enforcement source told gossip website TMZ.com that the 'Black And Yellow' hitmaker, who has 14-month-old son Sebastian with wife Amber Rose, was taken into custody and turned over to local police.
The 'We Dem Boyz' rapper shared several images online from behind bars, including a "jail selfie" in which he appeared to not be wearing any trousers.
Despite creating the hashtag "FreeTrapWiz," on Twitter and poking fun at the incident, he later hinted that he was becoming increasingly frustrated.
He tweeted: "I wanna drop 28 Grams but they got me locced up. Soon as I get out, the tapes comin out. Fucc that (sic).
"They're tryna figure out how many grams I had. How ironic (sic)."
Wiz recently admitted his pre-concert ritual is to "smoke a lot of weed" and also claimed he spent about £10,000 a month the drug.
But the star insisted he doesn't think his fans should emulate him.
He said: "I don't say, 'Yo, get up and do that.' I said that's what I do, and I tell you what I do while I'm doing it. I'm not trying to push drugs on anybody."

Kanye West thinks the Kardashian family are "the most remarkable people of our time."
The 'New Slaves' hitmaker gushed about his new wife, Kim Kardashian, and her famous family during several lengthy speeches at their wedding at the Forte di Belvedere in Florence, Italy on Saturday (24.05.14).
During one 20-minute "public warfare" rant, the opinionated rapper talked about the perks of pitfalls of their celebrity status, saying: "They feel like it's okay to put you on the tabloid covers to sell your image, to use you in an 'SNL' ('Saturday Night Live') spoof. We don't negotiate. We're not like that. We're not stupid.
"The Kardashians are an industry!
"At this table...the combination of powers...can make the world a better place. The most remarkable people of our time."
An insider told UsMagazine.com that the couple's 200 guests weren't surprised by Kanye's decision to speak several times, adding: "We all knew those would be coming. It would have been disappointing if it didn't happen."
The 'Blood On The Leaves' hitmaker also repeatedly praised his "beautiful" bride, calling her "the ideal celebrity... the ideal art," and said he was looking forward to "spending every day of my life with Kim."
The couple, who have 11-month-old daughter North, partied until 2.30am after tying the knot in front of a wall of flowers at sunset.
Guests included rappers Common, Big Sean and Tyga, and John Legend provided the entertainment at their reception.
The insider said: "It was just the most perfect night. And for all the talk about it being over the top or crazy -- it really wasn't! It was just the most beautifully put together, chic, intimate celebration. I don't think anyone will forget it.
"[The ceremony] was beautiful. Absolutely magnificent. The music was perfect - Kanye was very happy!"

Emma Willis says 'Big Brother' won't turn everyone into a celebrity.
The TV beauty - who has been part of the reality show since 2010 -admitted she still gets a huge buzz from her job but sounded a warning to hopefuls thinking the programme will make them famous.
She told the Mail on Sunday newspaper's You magazine: "The last series had such a brilliant impact - it felt like everyone was watching it again. We do five days a week, for three months, live - jobs like that in TV are rare.
"The live aspect is terrifying, but I want to be scared - It stops me getting complacent ... I love [the housemates] - they're normally bonkers.
"But if you want to be a celebrity and you think 'Big Brother is going to do that for you, it's not. You either go on to win the money or for the experience."
However, Emma insisted it was a "ballsy" decision to appear on the programme's sister show 'Celebrity Big Brother', pointing to the likes of Lee Ryan who struggled to cope with being in the spotlight.
She said: "It's quite ballsy of some people do it it because it can ruin them ... Lee ... Lee ... he's a funny one.
"He's like a 14-year-old at school who is thinking with, erm. the wrong part of his body. He made great TV but he didn't really help himself."

Joanne Froggatt is in line to become the next Bond girl.
The 'Downton Abbey' actress - who stars as head housemaid Anna May Bates in the hugely successful period drama - is reportedly being considered by 007 bosses as they cast the 24th adventure of the fictional British spy.
A source told the Daily Star Sunday newspaper: "The days are now counting down to the casting of the Bond girls.
"Everyone in the UK has been asked to keep quiet about their audition. Joanne is seen as a huge talent, whose acting makes her a real stand-out candidate."
It is said her experience on 'Downton Abbey' is a huge selling point for bosses as they look to find the right actress for James Bond's next big screen appearance.
The insider added: "Her role in 'Downton' will be a world away from Bond and that is what makes it so appealing for casting agents.
"Joanne is attractive but this time producers want a gritty woman who will be a match for 007."
In the past, the 33-year-old actress also played teenage mother Zoe Tattersall in 'Coronation Street'.

Arctic Monkeys have scrapped plans for a new album this year.
The 'Why'd You Only Call Me When You're High' rockers had initially intended to make a quick follow-up to 2013's critically-acclaimed LP 'AM', but now have no definite plans to return to the recording studio in the near future.
Bassist Nick O'Malley told NME Magazine: "We did have the chat but I don't think it's going to be happening. There are no plans for another record.
"I think people might want to forget about the Monkeys for a while.
"But who knows? We'll have a bit of time off and someone will say, 'Fancy doing another one?'"
The group think it is important to take some time off as they fear getting burnt out and "psychotic".
Nick said: "We've been doing this constantly for quite a while and it's important to have a break. Otherwise you burn out and get a bit psychotic."
And frontman Alex Turner says he is still to "wrapped up" in 'AM' to begin thinking about what the group do next.
He said: "I don't know what happens after the tour ends. I'm still pretty wrapped up in 'AM'. We're still slapping each other on the back for that one."