Celebrity Happy 26th Birthday, Elizabeth Olsen! See Her Style Transformation By Alaisha Key Published on February 16, 2015 @ 07:15AM Pin Share Tweet Email Photo: Bruce Glikas/FilmMagic, Rindoff/Dufour/Getty Images Happy birthday, Elizabeth Olsen! The actress, who stars as Scarlet Witch in the 2015 summer blockbuster Avengers: Age of Ultron, turns 26 today. And Olsen has plenty to celebrate! Since her breakout role as Martha in 2011's critically acclaimed Martha Marcy May Marlene, Olsen's star continues to rise. Like her older sisters Mary-Kate and Ashley (it must run in the family!), this actress is no stranger to making bold choices both on screen and on the red carpet. From sleek and straight locks to a chic lob, take a look at Elizabeth Olsen's changing style. PHOTOS: See Elizabeth Olsen's Changing Looks!