Olivia Olson
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
Filmography
7.9Adventure Time: Side Quests
2026 · TV · Marceline (voice) · 20 ep
5.2Teller's Camp
2025 · Movie · Sadie O'Leary
8.7Adventure Time: Fionna and Cake
2023 · TV · Marceline / Celine (voice) · 3 ep
- 8.7
Adventure Time: Fionna and Cake
2023 · TV · Marceline (voice) · 6 ep
7.0The Laughter & Secrets of Love Actually: 20 Years Later – A Diane Sawyer Special
2022 · Movie · Self
7.3We Baby Bears
2022 · TV · Ursa (voice) · 2 ep
- 7.3
We Baby Bears
2022 · TV · Pegasus / Employee / Goblin (voice) · 1 ep
- 7.3
We Baby Bears
2022 · TV · Ursa / Young Cassi (voice) · 1 ep
- 7.3
We Baby Bears
2022 · TV · Ursa / Voice on TV (voice) · 1 ep
- 7.3
We Baby Bears
2022 · TV · Pegasus (voice) · 1 ep
6.5The Glorias
2020 · Movie · Susanne Steinem (uncredited)
Grapefruit
2020 · Movie · Grapefruit