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Olivia Olson

Olivia Olson

Olivia Rose Olson (born May 21, 1992) is an American actress and singer-songwriter, mostly known for her voice roles as Vanessa Doofenshmirtz in Phineas and Ferb and Marceline the Vampire Queen in Adventure Time. She also played the character of Joanna in the 2003 film Love Actually and its 2017 short sequel Red Nose Day Actually. Olson is also a writer, contributing a section to the best-seller Adventure Time Encyclopedia and an upcoming book for Cartoon Network.
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