MEET ELIZABETH OLSEN: How the Olsen twins' little sister became the new superhero in the 'Avengers' sequel

Elizabeth Olsen is so much more than "the third Olsen sister."

Two years younger than her child star twin sisters Mary-Kate and Ashley, Elizabeth - also known as Lizzie - shied away from the spotlight as a kid. But during the Sundance Film Festival in 2011, the indie darling burst onto the scene and clinched the hearts of critics.

Next month, Olsen joins the superstar cast of "Avengers: Age of Ultron," as the mysterious, reality-bending sorceress Scarlet Witch. We decided to take a look back at the actress' meteoric rise to fame.