That mysterious third Olsen sister is set to become a little less mysterious.

Elizabeth Olsen, who garnered rave reviews at the Sundance Film Festival for her performance in the indie 'Martha Marcy May Marlene,' will star opposite Dakota Fanning in 'Very Good Girls,' Deadline reports.
An Education Movie Poster
An Education
PG-132009
Based on 34 critics

Despite her sheltered upbringing, Jenny (Carey Mulligan) is a teen with a bright future; she's smart,... Read More

Martha Marcy May Marlene Movie Poster
Martha Marcy May Marlene
R2011
Based on 39 critics

After several years of living with a cult, Martha (Elizabeth Olsen) finally escapes and calls her estranged... Read More