Jennifer Aniston celebrates 43rd birthday

On Friday night, one day before her 43rd birthday, Jennifer Aniston was already in a festive mood.
PHOTOS: See Jen Aniston as a baby, teenager and not-yet-famous actress!
The Horrible Bosses actress turned up at Chateau Marmont in West Hollywood with love Justin Theroux and another male pal -- grabbing her favorite spot on the back patio.
PHOTOS: How Jen got her groove back last year
She and her man, 40, wore both clad in black with rocker-style leather jackets. "She looked great!" one onlooker tells Us, adding that she was "in a great mood...smiling and glowing."
Arriving past nine, Aniston, Theroux and their pal drank wine as they chatted (and laughed!) for an hour and a half. Dating for nearly a year, the duo looked more in love than ever, according to the Chateau onlooker. "They touched each other alot! He had his hands in her hair at one point."

JENNIFER ANISTON IN STYLISH LOOKS

JENNIFAR ANISTON (AMERICAN)

Jennifer Joanna Aniston (born February 11, 1969) is an American actress, film director, and producer. She gained worldwide recognition in the 1990s for portraying Rachel Green in the television sitcom Friends, a role which earned her an Emmy Award, a Golden Globe Award, and a Screen Actors Guild Award.

Aniston has also enjoyed a successful Hollywood film career. She gained critical acclaim for her performances in the independent films She's the One (1996), Office Space (1999), The Good Girl (2002) and Friends with Money (2006). She has had her greatest commercial successes with the films Bruce Almighty (2003), The Break-Up (2006), Marley & Me (2008), Just Go with It (2011), and Horrible Bosses (2011). Aniston has been selected for a star on the Hollywood Walk of Fame in 2012.