Who Is Olsen Twins' Sister, Elizabeth Olsen?

Though she may not be as well-known as her starlet sisters, Mary Kate and Ashley Olsen, younger sister Elizabeth Chase "Lizzie" Olsen is making waves in Hollywood with her role in the new critically acclaimed Martha Marcy May Marlene, in which she stars opposite Hugh Dancy and Brady Corbet.

But the 22-year-old rising star, three years younger than her famous twin sisters who got their start by playing baby Michelle Tanner on the family sitcom, Full House, wasn't always taking Hollywood by storm. The graduate of the NYU Tisch School of the Arts and the Atlantic Theater Company Acting School previously appeared in a few of her famous sisters' productions when they were all kids, including playing herself in the series, The Adventures of Mary-Kate & Ashley.

That's quite a change from the sophisticated Martha Marcy May Marlene, about a young girl who attempts to flee a religious cult. The role inspired Olson from the beginning, particularly because it wasn't heavy-handed. "I think it's just a really amazing story that's unique, and there's nothing that we're trying to make people feel," she told Entertainment Weekly.

You can also see Olson in Chris Kentis and Laura Lau's horror flick, Silent House, in which she plays a young woman trapped in a nightmare, and the dramedy Peace, Love, & Misunderstanding with Jane Fonda. And don't worry, with two films in post-production and one about to commence filming, she's not likely to fall off the radar.

Martha Marcy May Marlene, directed by Sean Durkin, is set to hit theaters this December.