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Elizabeth Olsen Interview: On Her Childhood Cameos, The Valley And Her Big Sisters

WATCH: Elizabeth Olsen On Her Childhood Cameos, The Valley & Her Big Sisters

Wednesday night, Elizabeth Olsen stopped into "The Tonight Show" to promote her new film, "Silent House." Yet, the ingenue ended up talking about some film roles from times past -- including her cameos in "The Adventures of Mary-Kate & Ashley."

When she was still just a tyke, Lizzy almost got in the way of her big sisters solving the mystery in "The Case of Thorn Mansion." Jay Leno shares the clip.

Lizzy also recalls her family's no-so-good-luck with childhood houses in the San Fernando Valley -- eeek!

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