Popsugar Celebrity Oscars Who Is Brie Larson's Boyfriend, Alex Greenwald? Who Is Brie Larson's Beloved Fiancé? You Probably Already Know Him February 25, 2017 by Shannon Vestal Robson View On One Page Photo 3 of 12 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 Including in the audience. Previous Next Start Slideshow Brie LarsonCelebrity CouplesAward SeasonOscarsCelebrity FactsAlex Greenwald