Kristen Stewart, Clea DuVall, Alison Brie and Aubrey Plaza brought the Christmas spirit to Los Angeles on Tuesday night with the drive-in premiere of their new film Happiest Season. The Hulu rom-com, co-written and directed by DuVall, follows Harper (played by Mackenzie Davis) who brings her girlfriend (Stewart) home to her family for the holidays without revealing that she has not yet come out to her parents.