DreamWorks’ upcoming holiday comedy Office Christmas Party just added a few more cast members. According to The Hollywood Reporter, SNL’s Vanessa Bayer, Veep’s Sam Richardson, and The People v. O.J. Simpson’s Courtney B. Vance have signed on to the film, joining previously announced cast members Jason Bateman, Jennifer Aniston, T.J. Miller, Randall Park, Olivia Munn, and Kate McKinnon. DIrected by Blades of Glory’s Will Speck and Josh Gordon, the film follows “a hard-partying guy whose CEO/ sister is trying to close his branch. In an attempt to rally his co-workers and save their jobs, he and his Chief Technical Officer host an epic office Christmas party in an effort to impress a potential client.” The film is slated to hit theaters on December 9th.