Cast & creator
Olivia Olson
Best known for Adventure Time, Phineas and Ferb, Phineas and Ferb
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.
10
film credits
25
television credits
31
2003–2026 · acting roles
7.2
average across scored titles
Signature credits
Known for
Across film & television
Filmography (35)
Showing 35 of 35 credits
Adventure Time
Marceline the Vampire Queen (voice)
2010
Phineas and Ferb
Vennesa the Twi'Lek (voice)
2007Phineas and Ferb
Vanessa (voice)
2007Phineas and Ferb
Writer
2007Phineas and Ferb
Story
2007
Steven Universe
Pop Singer (voice)
2013
Adventure Time: Fionna and Cake
Marceline / Celine (voice)
2023Adventure Time: Fionna and Cake
Marceline (voice)
2023
We Baby Bears
Ursa (voice)
2022We Baby Bears
Pegasus / Employee / Goblin (voice)
2022We Baby Bears
Ursa / Young Cassi (voice)
2022We Baby Bears
Ursa / Voice on TV (voice)
2022We Baby Bears
Pegasus (voice)
2022
Zoey 101
Girl #1
2005
The Powerpuff Girls
Bliss (voice)
2016
Fast & Furious Spy Racers
PizzaRave (voice)
2019Fast & Furious Spy Racers
Jun
2019Fast & Furious Spy Racers
Guard (voice)
2019Fast & Furious Spy Racers
Jun (voice)
2019Fast & Furious Spy Racers
PizzaRave / Jun (voice)
2019
Love Actually
Joanna Anderson
2003
Inanimate Insanity
Lyricist
2011Inanimate Insanity
Songs
2011
Adventure Time: Side Quests
Marceline (voice)
2026
Adventure Time: Distant Lands
Marceline the Vampire Queen / Additional Voices (voice)
2020
The Tracy Morgan Show
Julia
2003
Phineas and Ferb the Movie: Candace Against the Universe
Vanessa Doofenshmirtz (voice)
2020
Phineas and Ferb: Star Wars
Vanessa the Twi'Lek (voice)
2014
The Glorias
Susanne Steinem (uncredited)
2020
Red Nose Day Actually
Joanna
2017
The Laughter & Secrets of Love Actually: 20 Years Later – A Diane Sawyer Special
Self
2022
Adventure Time: Fun with Finn and Jake
Marceline the Vampire Queen (voice)
2012
Voice Over
Little Girl
2012
Teller's Camp
Sadie O'Leary
2025
Grapefruit
Grapefruit
2020