She'll Be There For Jen! Courteney Cox Helps Aniston Celebrate 45th Birthday, With Justin Theroux At Work Back East

With her boyfriend Justin Theroux at work in New York, Jennifer Aniston celebrated her 45th birthday with BFF Courteney Cox on Tuesday, RadarOnline.com has learned.

The Friends alums enjoyed a dinner at West Hollywood's Soho House, E! reported, with Jen's confidante Jennifer Meyer (Tobey Maguire's wife) and hairstylist Chris McMillan also along for the meal.

As we previously reported, Theroux, 42, was seen Tuesday in New York filming his upcoming show The Leftovers, and appearing at a Mercedes-Benz Fashion Week event alongside Orlando Bloom.

Theroux and Aniston, 42, have spent considerable time apart in recent weeks as they're both busy with work. The two were last snapped together during their holiday vacation in Mexico with celeb pals Courteney, Jimmy Kimmel and Howard Stern.

Last week, Justin was seen visiting the home of his late friend Philip Seymour Hoffman and attending his funeral.

Theroux and Aniston have been an item for three years, first hooking up on the set of the comedy Wanderlust, and getting engaged in New York City later that summer.