
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.
Teller's Camp 2025
as Sadie O'Leary
The Laughter & Secrets of Love Actually: 20 Years Later – A Diane Sawyer Special 2022
as Self
The Glorias 2020
as Susanne Steinem (uncredited)
Grapefruit 2020
as Grapefruit
Phineas and Ferb the Movie: Candace Against the Universe 2020
as Vanessa Doofenshmirtz (voice)
The Powerpuff Girls: The Power Of Four 2017
as Bliss (voice)
Red Nose Day Actually 2017
as Joanna
Phineas and Ferb: Star Wars 2014
as Vanessa the Twi'Lek (voice)
Adventure Time: Fun with Finn and Jake 2012
as Marceline the Vampire Queen (voice)
Voice Over 2012
as Little Girl
Phineas and Ferb Summer Belongs to you ! 2010
as Vanessa Doofenshmirtz
Love Actually 2003
as Joanna Anderson
Credits from TMDB.