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Olivia Olson
Actor · Writer · 18 credits
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.
Known For
Adventure Time
2010
Marceline the Vampire Queen (voice)
Love Actually
2003
Joanna Anderson
Phineas and Ferb
2007
Vennesa the Twi'Lek (voice)
Steven Universe
2013
Pop Singer (voice)
Zoey 101
2005
Girl #1
We Baby Bears
2022
Ursa (voice)
All Work
Adventure Time: Side Quests
2026
Marceline (voice)
Teller's Camp
2025
Sadie O'Leary
Adventure Time: Fionna and Cake
2023
Marceline / Celine (voice)
We Baby Bears
2022
Ursa (voice)
The Glorias
2020
Susanne Steinem (uncredited)
