Olivia Olson

Olivia Olson’s Path from Holiday Film to Animation’s Most Beloved Vampire

Few animation careers begin with a moment as striking as Olivia Olson’s. At ten years old, she stood in front of a school audience in Love Actually (2003) and delivered a rendition of “All I Want for Christmas Is You” so technically accomplished that director Richard Curtis had to deliberately rough it up – audiences, he feared, simply would not believe a child could sing that cleanly. That debut planted the seed for a career built equally on voice, music, and storytelling.

Born May 21, 1992, and adopted at birth, Olson grew up in Los Angeles in a household steeped in creative work. Her father, Martin Olson, was a comedy writer and would later become her collaborator on Adventure Time literary projects. That proximity to the industry gave her early access – and she took full advantage of it.

Vanessa Doofenshmirtz and the Phineas and Ferb Years

From 2008 through the franchise’s various films and revivals, Olson voiced Vanessa Doofenshmirtz in Disney’s Phineas and Ferb – the sardonic, punk-adjacent daughter of the show’s bumbling antagonist. The role showcased a dry wit that suited her naturally, and it gave her room to sing: duets with Ashley Tisdale, solo numbers like “I’m Me,” and the holiday special entry “Got That Christmas Feeling” all became fan touchstones. Her singing in the 2020 film Phineas and Ferb the Movie: Candace Against the Universe continued the musical thread that has defined her work throughout the franchise. In 2023, she stepped behind the scenes as a writer for the Phineas and Ferb revival, a role confirmed alongside her return as Vanessa when the fifth season launched in June 2025.

Marceline the Vampire Queen and Adventure Time

The connection between Phineas and Ferb and Adventure Time is almost improbably direct. Creator Pendleton Ward contacted Martin Olson – not yet knowing he was Olivia’s father – to track down whoever voiced Vanessa. That inquiry led directly to Olivia landing the role of Marceline the Vampire Queen in 2010, a character she has described as sharing Vanessa’s uneasy relationship with an absent or difficult father figure. Marceline became one of Cartoon Network’s most celebrated animated characters – emotionally layered, musically expressive, and central to the show’s most acclaimed episodes. Her performance of “Everything Stays” in the “Stakes” miniseries, co-revealed with Rebecca Sugar at San Diego Comic-Con 2015, ranks among the most discussed musical moments in modern animated television. The role carried forward into Adventure Time: Distant Lands (2020), keeping Marceline’s story alive for a new platform and a continuing audience.

Bliss, the Powerpuff Girls, and Broader Work

From 2016 to 2019, Olson voiced Bliss – the fourth Powerpuff Girl – in Cartoon Network’s reboot series. The character arrived amid significant online debate, and Olson navigated the scrutiny with characteristic steadiness. Her casting reinforced a pattern: animation’s most complex female characters, the ones written with internal contradiction and genuine history, consistently land in her range. Beyond her animated roles, Olson appeared in Adventure Time: Hey Ice King! Why’d You Steal Our Garbage?!! (2012) and several subsequent Adventure Time games, and voiced characters in Fast & Furious: Spy Racers (2019).

Music, Writing, and the Larger Career

Parallel to her voice work, Olson has pursued an independent music career – releasing her debut EP Beauty Is Chaos in 2013 and the album Nowhere Land in 2018, the latter produced in collaboration with K-pop producers Kairos Music Group. On the writing side, she co-authored Adventure Time: The Enchiridion and Marcy’s Super-Secret Scrapbook with her father in 2015, writing Marceline’s sections in first person, and authored the Boom! Studios graphic novel Marcy and Simon. She contributed to the Adventure Time Encyclopedia for Cartoon Network and, as of 2023, added series writing credits to her resume with the Phineas and Ferb revival.