Tajja Isen (born June 29, 1991 in Toronto, Ontario, Canada) is a Canadian actress and singer-songwriter best known for voicing the title character in the television series Atomic Betty. She has several other voice credits, including the voice of Samantha in the movie Franklin and the Turtle Lake Treasure, Jane in the television series Jane and the Dragon, Jodie in the television series Time Warp Trio and Sister Bear in the television series The Berenstain Bears.