Jennifer Aniston enjoyed a huge celebrity-filled birthday party last Thursday, February 12.

Jennifer Aniston

Jennifer Aniston

The actress turned 46 last week and she was joined not only by her fiancé Justin Theroux at Hollywood's Roosevelt Hotel, but also friends such as Courteney Cox, Jimmy Kimmel, Ken Marina, Isla Fisher, Sacha Baron Cohen and many more.

Speaking to E! News a source said: "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 person who couldn't make the celebration was Reese Witherspoon, but she did send a message to her friend over Twitter.

She captioned a picture of the pair: "All my love to this lady on her b-day!!

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

It was revealed recently that Jennifer and Justin are now focused on planning their wedding, agreeing terms of a pre-nuptial agreement.

A source explained: "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."

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