Margot talks about her mom being in the audience, celebrating the holidays together, creating a super ambitious advent calendar for her husband, having a Christmas party with her girlfriends and learning the dance from Mean Girls, what Christmas is like in Australia, finding out Santa isn't real, the premiere of her new movie Babylon, learning how to cry on command, working with Damien Chazelle, all of the crazy stuff that happens in the movie, and since she has been sleeping with a Bunny since she was little, we surprise her with a life-sized version. Watch Jimmy Kimmel Live! WEEKNIGHTS 11:35/10:35c on ABC. Stream on Hulu.