Olivia Olson

Actor · Born May 21, 1992 · Los Angeles, California, USA

Biography

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.

Acted in 23

2020s

2026
Adventure Time: Side Quests
Marceline (voice) · 20 episodes
2025
Teller's Camp
Sadie O'Leary
2023
Adventure Time: Fionna and Cake
Marceline / Celine (voice), Marceline (voice) · 3 episodes
86
2022
We Baby Bears
Ursa (voice), Pegasus / Employee / Goblin (voice), Ursa / Young Cassi (voice), Ursa / Voice on TV (voice), Pegasus (voice) · 2 episodes
62
2020
The Glorias
Susanne Steinem (uncredited)
62
Grapefruit
Grapefruit
Adventure Time: Distant Lands
Marceline the Vampire Queen / Additional Voices (voice) · 1 episode
85
Phineas and Ferb the Movie: Candace Against the Universe
Vanessa Doofenshmirtz (voice)
78

2010s

2019
Fast & Furious Spy Racers
Jun, PizzaRave (voice), Jun (voice), Guard (voice), PizzaRave / Jun (voice) · 1 episode
62
2017
The Powerpuff Girls: The Power Of Four
Bliss (voice)
Red Nose Day Actually
Joanna
71
2016
Milo Murphy's Law
Vanessa Doofenshmirtz (voice) · 1 episode
75
The Powerpuff Girls
Bliss (voice) · 6 episodes
41
2014
Phineas and Ferb: Star Wars
Vanessa the Twi'Lek (voice)
78
2013
Steven Universe
Pop Singer (voice) · 1 episode
82
2012
Adventure Time: Fun with Finn and Jake
Marceline the Vampire Queen (voice)
Voice Over
Little Girl
2010
Adventure Time
Marceline the Vampire Queen (voice) · 279 episodes
86
Phineas and Ferb Summer Belongs to you !
Vanessa Doofenshmirtz

2000s

2007
Phineas and Ferb
Vennesa the Twi'Lek (voice), Vanessa Doofenshmirtz (voice), Tink (voice) / Crash (singing voice) · 1 episode
80
2005
Zoey 101
Girl #1 · 1 episode
68
2003
The Tracy Morgan Show
Julia · 1 episode
Love Actually
Joanna Anderson
68

Wrote 2

2010s

2011
Inanimate Insanity
Lyricist

2000s

2007
Phineas and Ferb
Writer, Story
80

Sound 1

2010s

2011
Inanimate Insanity
Songs

Appearances1

2020s

2022
The Laughter & Secrets of Love Actually: 20 Years Later – A Diane Sawyer Special
Self