April Stewart is an American actress and voice actress. She is best known for voicing Wendy Testaburger, Liane Cartman, Sharon Marsh, Carol McCormick, and many other characters in the Comedy Central animated sitcom South Park. She also voiced Pandora in Nickelodeon's Danny Phantom, Maria Rivera in El Tigre, and Raava and Fire Lord Izumi in the Avatar spin-off series The Legend of Korra. She also provided additional voices in Family Guy.
For Disney, she voiced Marci McFist in Disney XD's Randy Cunningham: 9th Grade Ninja, Silver Sable in Spider-Man, Lady Zartra and Power Princess in Avengers Assemble, and Professor Elera Ursa and Lady Rancora in Star Darlings. She also provided additional voices in Phineas and Ferb and Wreck-It Ralph.