Justin Theroux will marry Jennifer Aniston on his birthday.
The couple will reportedly tie the knot on August 10 - two years to the day the actor proposed on his 41st birthday - after undergoing "months of therapy" to talk through their problems.
A source told Britain's Grazia magazine: "After talking honestly, their issues seemed to evaporate.
"Justin admitted he hated the idea of an over-the-top wedding. Jen's happily agreed to a low-key do with friends and family.
"Jen's thrilled and Justin couldn't be happier."
Justin has reportedly agreed to relocate permanently from New York to Jennifer's Los Angeles home.
The source continued: "Jen doesn't like Justin going to NY alone and lunching with his ex-fiancee Heidi Bivens.
"But once she offered him space to script-write, Justin agreed to move his office to Los Angeles."
It was recently claimed the couple have been working on a script together.
A source said: "They worked out a story idea and a list of characters, and when Justin went away on a job for a week, Jen was so inspired she just kept on writing - alone."
But Justin was reportedly less than impressed with her efforts and it caused tension between the couple.
The source said: "Jen got the message loud and clear, shrieking, 'Are you kidding me? You're the one who pushed me to do this. I told you I wasn't a writer. Justin wisely zipped it as Jen angrily ripped up her pages and stormed off."

Ashley Roberts sees a spiritual guide and a guru regularly.
The former Pussycat Dolls star thinks it should be compulsory to have a "life coach" and she has an "army" of people to consult to help her make personal and professional decisions.
She said: "Growing up in school you're given maths and science but you're not given life classes.
"A few years ago I felt like my dreams were getting fulfilled but I wasn't happy, so I decided to seek out a life coach.
"I think everyone should have one because sometimes you do need a bit of help. I've got a team that I see - a swami [spiritual guide], an acupuncturist, a guru. I've got a whole army."
The 32-year-old beauty felt "burnt out" when she left Pussycat Dolls in 2010 and found spending time with a guru helped reignite her "passion" for her career.
She added to Stylist magazine: "After the Pussycat Dolls, I was burnt out. So when I left them in 2010 I did take a second to say, 'Right, I've done this for seven years, who the hell am I as an individual? Do I still want to do this?'
"I took a good couple of years out and followed a guru called Amma around and did a three-day retreat of hugging and mantras. That really helped me get my passion back."

Thandie Newton's son was born on her bathroom floor.
The British actress and husband Ol Parker welcomed baby Booker Jombe in March but she didn't want him to be born at a hospital so arranged for a midwife to be at her home instead.
She told US TV's 'Today' show: "He was born on the bathroom floor.
"I had just associated hospital with being ill, and I felt beautiful and healthy and wonderful when I was pregnant, and being at home is the place I felt most relaxed and comfortable."
The 41-year-old actress also had daughters Ripley, 13, and Nico, nine, at home, and feels it to be perfectly natural.
She added: "For me, it feels normal. There was a time when everybody had their babies at home and it wasn't such a big deal."
The 'Crash' actress announced her pregnancy in September and later admitted she was finding it tough working on action-packed police drama 'Rogue', in which she plays undercover cop Grace Travis.
She said: "Basically, I had two options; to withdraw from the show which would have meant the show collapsing, or to commit regardless.
"I'd seem actresses takes on meaty un-pregnant roles while carrying babies - Jodie Foster in 'Panic Room'. My agent also reassured me that both Claire Danes and Anna Paquin worked well into their first pregnancies. So - it was all going to work out just fine wasn't it?
"We're on episode nine, and are near enough to finishing for me to be able to chuckle at my naivety in thinking this was going to be anything other than mayhem, with a waddling lead actress at the centre.'"

Sir Paul McCartney has been hospitalised in Tokyo.
The Beatles legend had to cancel two dates of his Out There Japan Tour 2014 in the country's capital and Osaka after falling ill with a virus, which eventually led to him being sent to hospital.
His spokesperson said today (22.05.14): "Since contracting a virus last week that led to the postponement of tour dates, Paul received successful medical treatment at a hospital in Tokyo.
"He will make a complete recovery and has been ordered to take a few days rest.
"Paul has been extremely moved by all the messages and well wishes he has received from fans all over the world.
The 71-year-old rocker has also postponed a show in Seoul, South Korea, but is still set to continue with his tour of the US next month.
The 'Hey Jude' singer is reportedly "upset" about the situation as "he has only ever had to reschedule a handful of shows in his entire career" and hates disappointing fans.
An earlier statement from Paul on his website about the cancellations reads: "I'm so very touched. Unfortunately my condition has not improved overnight.
"I was really hoping that I'd be feeling better today. I'm so disappointed and sorry to be letting my fans down."

Adam Sandler claims Drew Barrymore finds doing romantic scenes with him awkward.
The funnyman has teamed up with the actress for a third time in new comedy 'Blended', and joked how doing intimate scenes with his friend gets more difficult for her as time goes on.
He said: "Absolutely, for Drew every time. It's been awkward [since] when we were strangers for her. But I keep saying, 'They paid you buddy, get in here.' "
The duo have previously appeared together in 'The Wedding Singer' and '50 First Dates' and Adam, 47, joked he gives her a few years off between movies.
He added to E! news: "She wouldn't want it every day, so I have to give her a pass every four or five years. And then I jump in and remind her of why she moved on."
Meanwhile, Drew - who is married to Will Kopelman, with whom she has one-month-old daughter Frankie and 20-month-old daughter Olive - claims she's the one that's always bugging Adam to work with her.
She told the Huffington Post: "I tend to be the one to nudge Adam. With 'The Wedding Singer', I was like, 'We have to work together, we have to find something. I've been saying that you and I are cinematic soul mates,' which probably sounded really crazy at the time because he didn't know me.
"'50 First Dates' was actually a different script. It was more of a drama ... Then he did a lot of writing on it and we made it into more of a comedy, and it is what it is. With this one, I reached out to him and said, 'Okay, I think it's time again!' And he was like, 'Okay, I'll go find something.'
"And then he called me months later and said he thought he'd found it."

Jessica Alba insists she's a "prude".
The 33-year-old actress may have first caught the attention of many playing stripper Nancy Callahan in 'Sin City' - a role she will reprise for the movie's sequel, 'A Dame to Kill For', later this year - but insists her on-screen sexiness is all an act.
Speaking to Entertainment Weekly magazine - which she appears on the cover of, emerging from a swimming pool in a white bikini - Jessica says: "I never slept my way through Hollywood, so I never felt like I compromised.
"Apparently people do it, I didn't. I felt like I never compromised myself because I'm a prude. I don't know. I grew up Catholic. In my head I'm always thinking, 'Oh God, can my grandma see this?' "
Jessica - who started her film career aged 13 before getting her big break appearing on the remake of TV series 'Flipper' in 1995 - has daughters Honor, five, and Haven, two, with husband Cash Warren, which she says has changed her attitude to her diet and made her stop trying to be "perfect", as she wants to set a good example for her children.
She said: "As I've gotten older and after I became a mom, it became more of a priority to be healthy for the right reasons. It's more important to have a balanced approach instead of trying to be perfect."

Lea Michele "cried hysterically" the first time she met Barbra Streisand.
The 'Glee' star is a huge fan of the iconic vocalist, and was honoured when she finally got to perform for her in January 2011 at a MusiCares Benefit show. Although she wasn't introduced to her then, they had a chance meeting at the Grammy awards a few nights later.
Lea writes in her autobiography, 'Brunette Ambition': "I left The Grammys early, in order to avoid the post-event valet rush, and was standing there in the quiet before the storm waiting for my car when I felt a tap on my shoulder. I turned around, and it was Barbra. And she said, 'I just wanted to say thank you for introducing me to your generation.' And I gave her a big hug, and told her that I thought she was amazing, and she looked at me and asked, 'Did I sound good tonight?' And I said, 'You were incredible.' And that was it. The minute she walked away, I started to cry hysterically. Sometimes you meet your idols and they don't live up to your expectations, but that moment was one of the best in my life."
Lea got another chance to meet her idol last year after she and co-star Chris Colfer went to see her in concert, but now regrets passing it up.
She explained: "It was a gorgeous night to sit under the stars and listen to Barbra: She sounded so beautiful and seemed so relaxed... At the end of the concert Chris wanted us to go backstage to say hi, but I didn't want to mar my perfect moment of meeting Barbra at The Grammys... so I chickened out.
"A few weeks later, I checked my mail and Barbra had sent me a copy of that night's programme with a note on it that said: 'Thank you for coming to my show, I wish you would have come backstage, I would have liked to have given you a hug.' And then I really died."

A potential burglar has been arrested after allegedly trying to break into George Clooney's Italian villa.
A 29-year-old Romanian man had sneaked onto 'The Monuments Men's property in Lake Como and stolen a bottle of wine from an alcove in the garden.
He was then spotted as he tried to force his way into the house by a member of staff who called the Carabinieri, the Italian national military police, who also deal with civil matters.
According to the Daily Telegraph newspaper, the man threatened the police with the bottle, but was overpowered and taken to a local station and charged with theft.
George, 52, was not at home at the time of the incident.
The actor is currently planning a "dream wedding" for his British lawyer fiancee Amal Alamuddin, which he is considering hosting either at the Lake Como property or Cabo San Lucas in Mexico.
Afterward, he is thought to be relocating to London so she can continue her work as a barrister at the Doughty Street Chambers.
Speaking of their marriage plans, a source said: "He'd marry her today if he could, but he wants to give her a dream wedding. It is her first, and he wants it to be his last!"
The brunette beauty's conservative Lebanese parents are also eager for the couple to make their union legal.
The insider said: "[They] are old-fashioned when it comes to these things. They expect a short engagement. George would do whatever makes her happy."

Alastair Griffin thinks pregnant Kimberley Walsh was a "soldier" on the video set for their new single.
The 36-year-old singer - who duets with the Girls Aloud star on his new track 'The Road' - was impressed when the heavily pregnant singer turned up for a promo shoot on a Yorkshire hillside with a broken wrist.
He exclusively told BANG Showbiz: "The brilliant thing about her is it was all work from the outset and she was going to work right through to the live performances, video, the lot. All credit to her for that.
"There we were on a cold hillside in Yorkshire, she was pregnant and she had a broken wrist at the time. I think she just tripped when she was at home and fell over, she was incredibly laid back about the whole thing. It was just cold. She was a little bit cold. I was cold. She soldiered on."
Despite her injuries, Alistair credited the 'Biology' singer for bringing "glamour" to the shoot.
He said: "It was great working with someone like Kimberley. She's done a lot ... Girls Aloud, Strictly Come Dancing, [she's] a public figure and she brings a bit of glamour and magic dust to the whole record.
He added: "She's been cool to work with. We had great fun when we did the video. She was vary laid back about the whole thing."
'The Road' - which will be released next month - has been chosen as the official anthem to Yorkshire's 'Grand Depart - The Tour De France' and Alistair revealed Yorkshire-born Kimberley was top of the list of possible collaborators for the track.
He said: "I always had it as being a duet in mind, with a girl, and we wanted someone, a singer from Yorkshire, and Kimberley was top of the list.
"I'm waiting for the call from Cheryl but Kimberley has always been my favourite."
'The Road' will be released on June 30 through Elbow Grease Records. The video for the single can be seen at www.youtube.com/watch?v=DagQili02Qk.
Alistair releases new album 'From Nowhere' on July 7.

Jennifer Lawrence was once sick in front of Miley Cyrus.
The Oscar winning actress was at a post Oscars celebration thrown by Madonna's manager in Hollywood in March, where she ended up vomiting, while Miley - a seasoned veteran of hard partying - looked on.
Jennifer explained to talk show host Seth Myers: "I've never gone out after Golden Globes or Oscars or anything. I'm just so sick of people by that point. I'm like, 'Ugh, god!' But this time I was like, 'I'm going out.' And I puked.
"There's this big fancy party, this Guy Oseary and Madonna party - if you get invited, you're like, you know, super-important. And I puked, on his porch.
"I was in such bad condition, and I look behind me while I'm puking, and Miley Cyrus is there like, 'Get it together.' "
The 'American Hustle' star blames her friend Laura - who she took to the Oscars with her - for being a bad influence on her.
She added: "She was a terrible influence on me. We left and then she was like, 'Meet me at the bar.' So I snuck out and I was like, 'Oh, my god!' I can't do this!' And she was like, 'You can do whatever you want!' "

Angelina Jolie would consider running for political office.
In addition to being an Oscar winning film star and mother to six children, the actress is a notable humanitarian - supporting a number of children's charities, lobbying the US government with human rights interests and being a special envoy for the U.N. High Commissioner for Refugees (UNHCR) - and says one day she could possibly run for office.
Speaking on 'Good Morning America' she said: "You know, if I thought I'd be effective, I would. But I'm not sure if I would ever be taken seriously in that way, and be able to be effective."
The 38-year-old star also took the brave decision to undergo a preventative double mastectomy last year, and says that decision has helped bring her both closer to people and raise awareness, which has had a very positive effect.
She added: "I wasn't worried about it, but I didn't expect there to be so much support. And I was very moved by it... It's connected me so much to other families, other women.
"And you know, and now when I meet people, we don't talk as much about films, but we talk about their children, or women's choices, or their wives. It's been a really beautiful journey."

Jay Z will be Kanye West's best man when he marries Kim Kardashian.
The '99 Problems' rapper will be the one to present the wedding ring when his friend marries the reality star at Forte di Belvedere in Florence, Italy, on Saturday (24.05.14).
A family member confirmed to MailOnline.com that Jay and his wife, Beyonce Knowles will be attending the wedding, saying: "Beyonce had to think about it at the last minute, she didn't really want to go, but I think Jay Z's the best man, so he's kind of making her go."
The superstar couple's arrival is eagerly awaited in Paris, where the wedding festivities will start on Friday (23.05.14), before guests are flown to Italy, for the ceremony the next day.
'Keeping Up with the Kardashians' star Kim - who is set to be married for the third time - is said to be worried rain will spoil her big day.
She was noticeably upset when she enjoyed dinner with her family at the Hotel Costes on Wednesday (21.05.14) before visiting the Eiffel Tower and a nearby carousel during a downpour, where she declared: "I hope the rain doesn't ruin my wedding."
The onlooker added: "She made it clear that this bad weather is really getting to her. She's clearly spending millions getting married in Europe, and if it all turns into a wash-out she will be really unhappy."