Justin Theroux proposed to Jennifer Aniston on his 41st birthday and, one year later, Jennifer made sure she repaid the favour by doing something extra special - throwing him an A-list-packed party at their new $21 million Bel Air mansion.
Guests could be seen arriving separately in their cars, and included Jason Bateman and his wife Amanda Anka, Tobey Maguire and his jewellery-designer wife Jennifer Meyer (Jen's a fan of her creations), Ellen DeGeneres, Portia de Rossi, Malin Akerman, Ben Stiller, John Krasinski, Jimmy Kimmel - the list stretches on.
There had been reports the party would in fact turn out to be the couple's nuptials, but that was not the case, as Jen and Justin were spotted mingling around the stunning 3.5-acre pad in casual attire. C'mon, she wouldn't get married in khaki shorts and wedges, would she?
Justin was snapped earlier in the day sunbathing on the stunning decked pool area, with sweeping views over Beverly Hills.
Stars snacked on canapés by candlelight, and no doubt were in awe at the eye-popping palatial pad.
Happy Birthday, Justin!
See the party pics below: