Mary Scheer (born March 19, 1963) is an American actress and comedian. She is best known as one of the original cast members of the sketch comedy series MADtv.
On Nickelodeon, she is well-known for playing Freddie's mother, Marissa Benson, on iCarly. She also voiced Alice the zookeeper on The Penguins of Madagascar. She also voiced a machine and a female doctor on the show. Prior to that, she voiced Suzie Kokoshka on Hey Arnold!