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.

Cast

Phineas and Ferb: Night of the Living Pharmacists

Vanessa Doofenshmirtz (voice)

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

Joanna Anderson

Red Nose Day Actually

Phineas and Ferb: Last Day of Summer

Vanessa (voice)

Phineas and Ferb: Star Wars

Vanessa the Twi'Lek (voice)

Phineas and Ferb the Movie: Candace Against the Universe

Vanessa Doofenshmirtz (voice)

Phineas and Ferb: Summer Belongs to You!

Vanessa Doofenshmirtz (voice)

Susanne Steinem (uncredited)