Amber Rose Tamblyn is an American actress, author, director, and writer. She had a staring role as Joan Girardi on the CBS series Joan of Arcadia. She also played Tibby Rollins in the 2005 film adaptation of The Sisterhood of the Traveling Pants and its 2008 sequel The Sisterhood of the Traveling Pants 2. In addition, she is the wife of actor and comedian David Cross.
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