Olivia Munn gave ET a behind-the-scenes tour of the Office Christmas Party set, where she dished on the previous connection she shared with co-star Jennifer Aniston.

Before Aniston married Justin Theroux in Bel-Air last year, the actor was giving dating tips to Munn in New York. The two were drinking buddies when Munn worked as a correspondent on The Daily Show in 2010.

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"He'd be like, 'This guy. Stay away from that guy,'" said Munn, who is currently dating Green Bay Packers quarterback Aaron Rodgers. "He does like Aaron."

Aniston reteams with her Horrible Bosses co-star Jason Bateman for Office Christmas Party, but this time they are accompanied by comedy all-stars Kate McKinnon, Olivia Munn, T.J. Miller, Vanessa Bayer, Courtney B. Vance, Rob Corddry and Sam Richardson.

In the movie, when a CEO (Aniston) tries to close the branch run by her hard-partying brother (Miller), he and his Chief Technical Officer (Bateman) rally their co-workers and host an epic office Christmas party in an effort to impress a potential client who could save their jobs.

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While the purpose of the shindig is to keep the branch afloat, everyone uses the party to serve their own personal goals. Richardson is a guy from legal itching to show off his skills as a DJ, Bayer is an executive assistant looking for love, and McKinnon needs to satiate her obsession with the holidays, to hilarious results.

Office Christmas Party hits theaters Dec. 9.