From Wikipedia, the free encyclopedia Claire Rhiannon Holt (born 11 June 1988) is an Australian actress, best known for her roles as Emma Gilbert on the television show H2O: Just Add Water, Chastity Meyer on Mean Girls 2, and Rebekah Mikaelson on The CW series The Vampire Diaries and its spin-off series The Originals.Holt was born in Brisbane, Australia. She graduated from Stuartholme School in Toowong at the end of 2005. She is involved in several sports: swimming, volleyball, water polo, and Tae-Kwon-Do, in which she has a black belt. When she was younger, she was in the school choir.