Erin Grey Van Oosbree (born August 24, 1973), now known professionally as Grey Griffin (formerly DeLisle and pronounced De-lyle), is an American actress, comedian, and singer-songwriter. She has done voice acting for numerous animated films, television shows, and video games. Her long-running voice roles include Vicky from The Fairly OddParents, Mandy from The Grim Adventures of Billy & Mandy, Daphne Blake from the Scooby-Doo franchise, and Azula from Avatar: The Last Airbender.