Jennifer Aniston enjoyed a star-studded birthday dinner on Thursday (12.02.15).

The 'Cake' actress turned 46 last week and she and her fiance Justin Theroux were joined at Hollywood's Roosevelt Hotel by friends including Courteney Cox, Jimmy Kimmel, Malin Akerman, Amy Adams, Lake Bell, and Ken Marino, as well as couples Sacha Baron Cohen and Isla Fisher, John Krasinski and Emily Blunt, and Tobey Maguire and Jennifer Mayer for a celebratory meal.

A source told E! News: ''The party appeared to be over just before 1 a.m. in the morning.

''Jennifer and Justin left through a different entrance as the rest of the party grabbed their cars from valet.''

One friend who couldn't make the dinner was Reese Witherspoon, but the 'Wild' star sent a message to her friend via Twitter.

Alongside a picture of the pair, she wrote: ''All my love to this lady on her b-day!!

''Her light, grace & humor make the world (& ME) smile! #JenniferAniston #WCW (sic)''

It was recently revealed Jennifer and Justin - who have been engaged for over two years - are now focussed on planning their wedding after agreeing terms of a pre-nuptial agreement.

A source said: ''There's been a lot of talk among friends that [the wedding] could be at their Bel Air home on May 16. They came to an agreement after Justin scaled down his demands - at one point he suggested a £1.3million 'cheating clause', but that's now off the table.

''Jen's fortune is considerably greater than Justin's, but if the marriage ends, she'll now only pay out £1million.''