Jennifer Lawrence is filming love scenes with her ex-boyfriend Nicholas Hoult for 'X-Men: Apocalypse'.
The pair - who split earlier this year - play mutant lovers in the next installment of the Marvel comic book picture and have been forced to put their differences aside for the sake of the steamy script.
Jennifer, 24 - who plays the blue cat-suited Mystique in the action-adventure film and is currently dating Coldplay frontman Chris Martin - will get close to Nicholas (Beast) as the plot of the upcoming movie's script centres around the relationship between the characters.
A source told The Sun newspaper: "It's a huge ensemble franchise but the point of the latest film was to strip that back and focus on Jen and Nick's characters' relationship."
The former couple - who met of the set of 'X-Men: First Class' in 2011 - ended their relationship in August, citing their busy schedules for the reason behind the split.
Despite their change in circumstance, it was too late for movie bosses to rewrite the script, and the pair are said to be determined to make it work.
A source said: "Earlier this year that seemed like a great idea, but now they've split and it's too late to rewrite the script. They are very professional of course, and will make it work."
Meanwhile, Nick, 24, is thought to be dating 'Twilight' star Kristen Stewart and was recently spotted cosying up to the actress at a Cinema Society bash in New York, after meeting on the set of their new movie 'Equals'.

Shia LaBeouf had a "scary" time in jail after was forced to wear a 'Hannibal' mask and led jacket put on him.
The 28-year-old actor spent 24 hours in jail after being arrested for disorderly conduct in June, but the star insists his stint in custody felt like "forever" after he had a restraint mask, similar to the one worn by cannibal character Hannibal Lecter in crime thriller 'Hannibal', put on him.
He said: "Jail was quite scary ... I was there for, it felt like forever, I think 24 hours 25 hours ... I really went all the way with it they put a Hannibal mask on me and a led jacket. It was very scary."
After being taken to the police station following his arrest while he was watched a Broadway performance of 'Cabaret', Shia spat on an officer, which he has now issued an apology for after admitting it was a big mistake.
Speaking on 'The Ellen DeGeneres Show', in an interview to be aired today (10.10.14), the 'Fury' actor said: "I [did] spit on a cop. That's a no, no. I'm sorry if you're watching dude I'm sorry. That was crazy, man."
Shia also credited his mother Shayna with helping him to get over his problems.
He said: "That's my girl. She called me. It's been a process. I'm quite stubborn and an only child, it's just been me and her.
"She was mom and dad. We've had it all. Now I'm on the right path. Thank you, mom."
When Ellen asked the actor what she said to him on the phone, he replied: "Stop f***ing around."
Since his June arrest, which occurred after he started shouting at actors in the play - which stars Alan Cumming and Michelle Williams - swearing at security guards and smoking, the 'Transformers' actor has sought treatment for an alcohol problem and insists he is now back on track.
He said: "I went through like an existential crisis, which turned into some explorations. I had some hiccups, some judgment errors."
Shia pleaded guilty to disorderly conduct in September but a judge ruled his plea would be dismissed and he would avoid both jail time and probation if he had treatment for another three months and stayed out of trouble for six.

Dermot O'Leary didn't have many girlfriends growing up.
'The X Factor' host says that rather than spending his teenage years trying to charm girls, he was more interested in watching football and "having fun".
Dermot, 41, told The Sun newspaper: "Mates of mine who had girlfriends when I was growing up always seemed to be going to their parents or grandparents for dinner.
"That sort of thing terrified me."
The presenter, who first rose to prominence on Channel 4 show T4, admits the lack of attention he received from girls in his younger days has impacted his emotional wellbeing.
He explained: "I didn't grow up as a good-looking guy. Girls weren't interested in me at school.
"So I probably just didn't find the right person. And that has made me emotionally stunted."
The presenter, who married TV producer Dee Koppang in 2012, also admits he'd make a rubbish contestant on 'The X Factor'.
He said: "I'd be one of those contestants people think shouldn't have gone through because they're too happy. I'm a dust-yourself-down kind of guy.
"My dad is like that. He's from that post-war generation where you don't talk about (miserable) stuff, you just get on with it."

The 'X Factor' contestants are banned from having relationships with one another.
The finalists are all sharing a house in London together and though a number of hopefuls have confessed to having crushes on one another, they aren't allowed to take things further.
Jake Sims from the still-unnamed eight-piece boy band said: "You haven't read our house rules - no intercourse."
His bandmate James Graham added: "None of that stuff and no kissing of any kind."
Reese Bibby added: "No touching! We live in a bubble."
Almost all of the band admit to having their eyes on one of the other contestants.
James said: "I fancy Blonde Electra."
Barclay added: "He doesn't shut up about them. He fancies all the girls in the house."
Reece proclaimed: "Parisa from Only the Young is fit."
Jake added: "I can say that I do fancy someone but it may have to be kept confidential... I do think Betsy from Only the Young is absolutely beautiful."
However, Casey Johnson insisted he is trying to stay professional.
He told OK! magazine: "I'm here for the competition, not for the girls."

Hugh Bonneville has likened 'Game of Thrones' to a modern-day Shakespearean play.
The 'Downton Abbey' actor has compared the works of famed playwright William Shakespeare to the popular HBO show, 'Game of Thrones', which is based on the novels by George R. R. Martin, claiming they have the same levels of "lust" and "violence".
He said: "Shakespeare gives us just as much politicking, intrigue, lust and violence as you'll find in any episode of 'Game of Thrones'.
The 50-year-old star also slammed schools for making the playwright appear boring to students.
He told Radio Times magazine: "The classroom can all too often be the death of [Shakespeare]. I know I'm not the only one who had to read aloud, line by line round the class, until Sir threw his chalk at someone for nodding off.
"Treating these plays like holy scripture, to be revered, can deter the newcomer for ever."

James Marsden doesn't feel like a proper actor.
The 41-year-old admitted that he feels insecure about his acting ability and continues to fear he will not be able to find work, despite having a career spanning more than 20 years.
The 'Butler' star told Hull Daily Mail newspaper: "I still feel like I'm kind of faking my way through it.
"I think one of the common neuroses of being an actor is you feel like your next job is going to be your last job,"
The father-of-three earned his stripes appearing in 'Zoolander' and 'X-Men', but is most well known for his roles in romantic drama 'The Notebook' and flamboyant musical 'Hairspray'.
But the actor - who has also recently embarked on a music career - has now learnt to reassure himself of his capacity to perform.
He continued: "Now I actually feel like, 'OK, you've been doing this for 20 years, you understand the business, you understand the technical aspects of being on set, you know what's required of you and where your strengths and weaknesses are. OK, you'll keep working'."
And it seems that he's enjoying his career path even more as he gets older, despite being uncertain about his future in the industry, stating that he finds the roles to be far more intriguing than those he was offered as a youngster.
He explained:"The older you get, the more interesting the roles are. When you're young, you're playing the Romeo and Juliet and it's all love-driven and hearts coming out of your eyes.
"When you're older, there's more complexity to the way you show love, and what's carried with that, and there's a pain behind it sometimes."

Hugh Grant never prepares for a movie role.
The 54-year-old actor admits it's rare that he does any preparatory work for a part and instead prefers to deal with whatever challenge he's been handed on the first day of filming on set.
He told ITV's 'Good Morning Britain': "I've barely ever done any research for a film. I just turn up and say the lines and hope they sound convincing."
What's more, Grant - who has appeared in iconic films such as 'Notting Hill' and 'Love Actually' - said he has no interest in starring in a high-profile action role like James Bond, suggesting such parts are "boring".
He explained: "I mean you sit around all day, your stuntman does most of your work, and occasionally you say, 'Noooo!' and that's the end of your day."
Earlier this week, Grant's long-time collaborator Richard Curtis said he initially considered the actor to be "too good looking" for the role he ultimately played in the 1994 film 'Four Weddings and a Funeral'.
Speaking at the Cheltenham Literature Festival, Curtis, 57, explained he was reluctant see Grant fill the role of Charles because he was too handsome.
He said: "The absolutely key thing for that film when I was writing it was that the person who was playing the lead would not be good looking. That was the absolute starting thesis of the film.
"So when finally we'd auditioned every single young person in the country and we were voting, me, Mike [Newell, the director] and Duncan [Kenworthy, producer], two people voted for Hugh - that was them. And I voted for someone else."

The Who are working on a new album.
The legendary rock group released 'Be Lucky' - their first new song in eight years - last month, and lead singer Roger Daltrey, 70, has confirmed they're working on new material for the eagerly-awaited record.
He told the Daily Mirror newspaper: "The Who have got a new record out. It's 50 years on and we have passed the audition. We've done one song and we are going to do a whole album. It's exciting."
The London-born singer, who also founded the iconic group, explained that being in a band has changed as they have aged.
He said: "It's not as rock and roll, it could never be as rock and roll because we are older..
"There's drugs but they are just different - it's now all Imodium and those types."
It's been confirmed that 'Be Lucky' - their newest single - will appear on the band's upcoming compilation Who Hits 50
The much-hyped release will be The Who's first new material since 2006, when they launched 'Endless Wire'.
Meanwhile, sing-songwriter Pete Townshend, 69, has also confirmed that the group intend to head out on tour to mark the 50th anniversary since the formation of the classic line-up.

Kristen Stewart and Nicholas Hoult were seen cosying up at a bash in New York.
The actress attended a Cinema Society event for her new film 'Clouds of Sils Maria' at Omar's, where she was seen getting very close to Hoult, Jennifer Lawrence's ex-boyfriend.
The pair, who are co-stars in the upcoming 'Equals', "stuck together throughout the party", according to the New York Post's Page Six Column.
The event, which was also attended by the likes of Patti Smith, Juliette Binoche and Viggo Mortensen, has served to fuel speculation that Stewart, 24, and Hoult, also 24, are dating, despite denials from the actress.
A source close to Stewart - who split from Robert Pattinson, 28, in 2013 after four years of dating - recently told E! News she is enjoying being single.
The source said: "She is in a really, really good place right now. She is really happy with the films she is working on and she is in a great spot in her career."
The source added: "She is finally able to focus on herself and not worry about the nonsense that is out there. This is the best many close to her have seen her in quite a while."

Jennifer Lawrence has risked upsetting Gwyneth Paltrow by describing gluten-free diets as "the new cool eating disorder".
Lawrence, 24, is currently dating Coldplay frontman and Paltrow's ex Chris Martin, but has hit out at one of the things closet to the 42-year-old actress' heart - gluten-free eating.
'The Hunger Games' star suggested the diet is a mere fad, telling Vanity Fair: "[It's] basically, "I just don't eat carbs."'
Gwyneth, however, is a big advocate of gluten-free eating, explaining her dietary decisions in her book, 'It's All Good'.
She said: "Every single nutritionist, doctor and health-conscious person I have ever come across ... seems to concur that (gluten) is tough on the system and many of us are at best intolerant of it and at worst allergic to it.
"Sometimes when my family is not eating pasta, bread or processed grains like white rice, we're left with that specific hunger that comes with avoiding carbs."
Earlier this week, it was claimed Paltrow wants to spend time getting to know Lawrence.
The actress is said to be keen to introduce her to her daughter Apple, 10, and eight-year-old son Moses.
An insider told Us Magazine: "She'd like to spend a little time with her and thinks they'd probably get along.
"Gwyneth wants to be sure about her."

Lily Collins claims honesty is the key to having a good relationship.
The 25-year-old actress doesn't think there's an ultimate secret to falling in love and staying in love but believes being truthful with your partner builds the best foundation for long-term happiness.
Speaking to BANG Showbiz, she said: "It doesn't matter how long it takes to get there, to be in love, as long as in the end people are honest. When you're honest it pays off.
"Everyone has their own speed at which they're honest, so I would say it's beautiful but it depends on person to person."
Lily plays Rosie Dunne, the romantic interest of Sam Clafin's alter ego Alex Stewart in her latest role in 'Love, Rosie', which sees the two best friends slowly realize they have fallen for each other.
The romantic comedy is full of awkward moments and the starlet - whose parents are musician Phil Collins and his second wife Jill Tavelman - says many of the embarrassing scenes are very true to life.
Lily explained: "Everyone has a friend who has gone through something as funny as some of the moments in there.
"We kind of shine more light on those awkward moments and say it's OK everyone goes through those moments."
'Love, Rosie' also stars Tamsin Egerton, Suki Waterhouse, Jaime Winstone and Art Parkinson.

Anne Hathaway gets told she isn't "sexy" enough for movie roles.
The 'Les Miserables' actress has enjoyed huge career success, she admits it hasn't been easy because there are so many parts she is told she isn't the right fit for.
She said: "Even though I've had great success, touch wood, it hasn't been easy. A lot of people have told me, 'You're not this and so can't play that,' and I can't tell you the amount of times I've been told I'm not sexy.
"I just go, 'I'm a lot of things. Just because I don't wear my sexiness overtly doesn't mean that I can't become that girl for a role. That's what I do; I become things. Use your imagination, buddy.'
"So in terms of not listening to what other people told me about who I was as an actress and then really pursuing it, I think I've been daring in that way."
After winning an Oscar in 2013, Anne experienced a career backlash for being perceived as "inauthentic" and she admits she struggled to get hired afterwards.
She told the new issue of America's Harper's Bazaar magazine: "I had directors say to me, 'I think you're great. You're perfect for this role, but I don't know how audiences will accept you because of all this stuff, this baggage."
Her fortunes changed when her 'Dark Knight Rises' director Christopher Nolan cast her in 'Interstellar'.
She added: "Once it was announced that I was doing Interstellar, thankfully the phone started ringing again."