Alison Brie is set to star in romantic comedy "Happiest Season" along with Dan Levy and Aubrey Plaza. File Photo by Serena Xu-Ning/UPI
Dan Levy arrives for the 26th annual SAG Awards on Sunday. File Photo by Jim Ruymen/UPI
Aubrey Plaza attends the premiere of "Child's Play" on June 19. File Photo by Jim Ruymen/UPI
Jan. 22 (UPI) -- Alison Brie, Dan Levy and Aubrey Plaza have joined the cast of romantic comedy Happiest Season starring Kristen Stewart and Mackenzie Davis in the lead roles.
Victor Garber, Mary Steenburgen, Ana Gasteyer, Burl Moseley, Sarayu Blue and Jake McDorman have also joined the cast.
Happiest Season follows Stewart as she prepares to propose to her girlfriend, portrayed by Davis, at her family's annual holiday party.
Things get complicated after Stewart realizes that her girlfriend hasn't come out to her conservative parents, played by Garber and Steenburgen.
Clea DuVall is directing and co-wrote the script with Mary Holland.
Filming started this week in Pittsburgh. Happiest Season is set to hit theaters on Nov. 20.