Biography
Olivia Olson is an American actress, singer-songwriter and screenwriter. Born on 21 May 1992 in Los Angeles, California, she began her career as a child with a role in the 2003 film Love Actually.
She is best known for voicing Vanessa Doofenshmirtz in the Disney series Phineas and Ferb (2007–present) and its related films, and for voicing Marceline the Vampire Queen in the Cartoon Network series Adventure Time (2010–2018) and its spin-offs. Her father, Martin Olson, is a writer and songwriter on Phineas and Ferb. From the fifth season onwards she has also contributed as a writer and story editor on the series.
