Amber Rose Tamblyn (born May 14, 1983) is an American actress and writer. She first came to national attention in her role on the soap opera General Hospital as Emily Quartermaine, followed by a starring role on the prime-time series Joan of Arcadia, portraying the title character, Joan Girardi for which she received Primetime Emmy and Golden Globe nominations. Her feature film work includes roles in The Sisterhood of the Traveling Pants (2005), The Grudge 2 (2006), The Ring (2002), and 127 Hours (2010); she had an extended arc as Martha M. Masters in the medical drama series House. She also had a starring role as Jenny on season eleven of the CBS sitcom Two and a Half Men.