Olivia Rose Olson (born May 21, 1992) is an American actress and singer-songwriter. She is mostly known for her voice roles as Vanessa Doofenshmirtz in Phineas and Ferb and Marceline the Vampire Queen in Adventure Time,, Nutri Ventures, Bliss from Craig McCracken's The Powerpuff Girls franchise. She also played the character of Joanna in the 2003 movie Love Actually and its 2017 short sequel Red Nose Day Actually.
Olson at Magic City ComicCon
|Birth name||Olivia Rose Olson|
|Born||May 21, 1992|
Los Angeles, California, U.S.
Her father is comedy writer Martin Olson.
- Bradley, Bill (October 27, 2014). "8 Facts You Didn't Know About 'Adventure Time,' Even If You Were Born In Ooo". The Huffington Post. Retrieved February 3, 2015.