Olivia Olson

Olivia Olson
Olson at GalaxyCon Oklahoma City in 2024
Born	(1992-05-21) May 21, 1992 (age 32) Los Angeles, California, U.S.
Occupations	Actress singer songwriter
Years active	2003–present
Father	Martin Olson
Musical career
Genres	Acoustic R&B pop
Instruments	Vocals piano guitar bass
Labels	RoseGold
Musical artist

Olivia Olson (born May 21, 1992) is an American actress, singer-songwriter, and writer, largely 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.

Along with this, she is also a writer, having written the Boom! Studios graphic novel Marcy and Simon, co-authored Adventure Time: The Enchiridion and Marcy's Super-Secret Scrapbook, and contributed writing to the best-seller Adventure Time Encyclopedia for Cartoon Network. In 2023, she began writing for the Phineas and Ferb revival.