Mary Scheer (born March 19, 1963) is an American actress, comedian, screenwriter and producer, who is best known for her work throughout television. She had recurring roles as Marissa Benson on the Nickelodeon-sitcom iCarly, and as Gladys on the Disney Channel series Bunk'd. She voiced Alice the Zookeeper on DreamWorks animated series The Penguins of Madagascar, was part of the original cast on the sketch comedy show Mad TV, voiced every female character on Most Extreme Elimination Challenge and appeared in GEICO commercials.