News Elizabeth Olsen Actually Picks a Favorite Olsen Twin By Antoinette Bueno 6:52 AM PST, February 21, 2014 Bravo Elizabeth Olsen, 25, is picking favorites when it comes to her famous sisters, 27-year-old Ashley and Mary-Kate Olsen, and actually revealed her favorite twin on Bravo's Watch What Happens Live! When asked to pick between Ashley and Mary-Kate on Wednesday's show, Elizabeth hesitated for a moment, before giving her surprising answer. Pics: They're Related?!"Ashley remembered my birthday but I don't hold grudges against Mary-Kate forgetting mine," she said. "She was out of town! ... I should've just picked my brother." Video: Elizabeth Olsen Reveals 'Irrational' FearsCheck out a clearly embarrassed Elizabeth -- also sporting a new brunette 'do -- here!