Amidst reports that their relationship is on the rocks, Jennifer Aniston was on hand to throw one heck of a distraction as she lavished her hubby Justin Theroux with gifts and visits from his famous friends as the actor celebrated his 42nd birthday this weekend.

Jennifer Aniston Justin Theroux
The couple celebrated Justin's birthday and their one year anniversary as an engaged couple

There was no shortage of celebrity guests either, with famous faces dotted all around Jen and Justin's Bell Air mansion to wish Justin a happy birthday. Although Jen's BFF Courtney Cox couldn't attend the birthday bash, as the actress is reportedly recovering from a broken wrist still, reports state that among the attendees at their Los Angeles home were Ben Stiller, Tobey Maguire and Jason Bateman. Fellow actors Don Cheadle, Will Arnett, Malin Ackerman, Kristen Bell and her fiance Dax Shepard and Isla Fisher and her husband Sacha Baron Cohen were also in attendance, as were comedians Jimmy Kimmel and Ellen DeGeneres and their partners.

A source in attendance at the party spoke with E! News afterwards, revealing that the whole soiree was a casual occasion, with Justin in a t-shirt and jeans while Jen sported a mini skirt. Guest congregated around the pool and fire pit or in her living room, feasting on finger foods and hors d'oeuvres prepared by Jen's own personal chefs and helping themselves to drinks at the massive bar.

Jennifer Aniston
Jen appears in the new comedy 'We're The Millers'

"Justin was hanging out with Scott Campbell and Dax Shepherd at the beginning of the party," the source told E! "They were having a great time laughing and joking around. Jen was nearby talking to Mandy Ingber and Isla Fisher. She was hugging her friends and talking closely with them most of the night."

Not only was the night a celebration of Justin's 42 years, but also a celebration of the duo's one year anniversary as an engaged couple. So, will the next cake they share be wedding cake?

Jennifer Aniston Justin Theroux NYC
The couple look to be on the mend following reports that their relationship is in trouble