AceShowbiz -

"Office Christmas Party" cast members flocked the Regency Village Theatre in Los Angeles on Wednesday, December 7 for a premiere of the comedy flick. Jennifer Aniston, T.J. Miller, Olivia Munn and Jillian Bell hit the red carpet for the special screening.

Aniston flaunted plenty of cleavage in a low-cut embroiled dress. Meanwhile, Miller, who was accompanied by wife Kate, stole attention as he dressed in patterned pants and a red vest, combining it with a bright green bow tie and white shirt.

Munn looked stunning in a white floor-length and backless gown, while Bell showed off her busty figure in a black lace crop top beneath her bolero jacket. The comedienne completed her ensemble with an ankle-length skirt.

Also in attendance were directors Josh Gordon and Will Speck, who went formal in tuxedos. Among the guests were singers Katy Perry and Kelly Rowland, and just-selected Academy Award host Jimmy Kimmel, who was accompanied by pregnant wife Molly McNearney.

Perry glammed up in a sleeveless black gown as she posed for photographers with Aniston, and Rowland looked equally gorgeous in a lovely long dress. Kimmel, meanwhile, went casual as he rocked jeans and black leather jacket.

"Office Christmas Party" hits U.S. theaters this Friday. In the comedy film, when Clay's (Miller) uptight CEO sister (Aniston) threatens to shut down his branch, he and his Chief Technical Officer must rally their co-workers and host an epic office Christmas party in an effort to impress a potential client and close a sale that will save their jobs.