VIDEO : Matt Damon's Smile is Contagious at the London Premiere of The Martian

Matt Damon , Kate Mara, Kristen Wiig, and Jessica Chastain all hit the red carpet for the London premiere of The Martian on Thursday. Matt brought his wife, Luciana, to that red carpet , but this time it was all about his leading ladies. Matt was all smiles despite recently getting into hot water over comments about diversity that aired during the fourth season of HBO's Project Greenlight.