The new holiday comedy Office Christmas Party is a gleefully adult romp that reunites Jennifer Aniston with Jason Bateman and their The Switch directors Josh Gordon and Will Speck. "This movie has everything," Aniston laughs, referring to the range of antics from the requisite photocopying (and, yes, 3D printing) of naked body parts to a full-on car chase. "I've known about this movie for so many years, so I always was joking that there'd better be a part for me in there. It started off as a little cameo. It was supposed to be just a small little thing."

Kate McKinnon, Jason Bateman and T.J. MillerKate McKinnon, Jason Bateman, T.J. Miller and Olivia Munn

Olivia Munn laughs at that: "And then they go, 'Wait, Jennifer Aniston is willing to be in the movie? What if we call it a cameo and just extend it and extend it?' Day 15, she still thought it was a cameo!"

Aniston enjoyed playing the movie's antagonist. "I'm sort of the Grinch who wants to steal Christmas away from all of these hard-working employees who are not doing as good of a job as they should be doing," she laughs.

Watch the trailer for 'Office Christmas Party' here:


 

Her costars enjoyed the movie's wild atmosphere. "The movie is about the idea of throwing the rules out of the window for one night," says T.J. Miller. "The next day all will be forgiven, so everybody goes for it that evening. And that was the feeling, actually, on the set. It was long hours, it was tough, but everybody kind of went, 'We're just going full tilt on this one.'"

Jason Bateman agrees, "It was such a big cast and then you had 300 extras every day," he says. "Fortunately my character got to play with a lot of people. I just tried to keep a straight face the whole time."

More: Read our review of 'Office Christmas Party'

This wasn't easy with expert comics like Kate McKinnon and Vanessa Bayer, who have honed their craft on Saturday Night Live. "Those girls are constantly doing improv, so I never knew what was about to come out of their mouths," Aniston says. "Try to get through a scene without laughing. I'm like, 'Get it together, Aniston!'"

Of course, Aniston was also part of one of the most famous comedy ensembles in television history: Friends. And she's constantly asked if they'll reunite. "I don't know what we would do," she says. "People have such nostalgic affection for it. There was something about the time - our faces weren't shoved into cellphones and we weren't checking Facebook and Instagram. We were in a room together, and we were talking."