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.

"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," a source said.

Justin has reportedly agreed to relocate permanently from New York to Jennifer's Los Angeles home. "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," the source continued.

It was recently claimed the couple have been working on a script together. "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," an insider said. But Justin was reportedly less than impressed with her efforts and it caused tension between the couple: "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."