No, Mary-Kate and Ashley Olsen do not have a long-lost triplet. This is their younger sister, Elizabeth, who just turned 22. Elizabeth made a few appearances in the twins' videos when they were younger, but, for the most part, she stayed out of the limelight. At the 2011 Sundance Film Festival, however, she was the talk of the town. The NYU student had two films premiere at the festival, and she showed that she has a fashion sense completely different from that of her elfin sisters.
Try on Elizabeth Olsen's hairstyles in the Makeover Studio!