Brie Larson and her boyfriend Alex Greenwald looked like cute teenage sweethearts on prom night when they walked the glitzy ‘King Kong: Skull Island’ red carpet on Wednesday (08.03.17) night in Los Angeles. Hunky Alex donned a dinner suit and bow tie with a red corsage that matched Brie’s shimmering frock, and the Oscar-winning actress wore her hair in a classic loose wave. Aww.