Wallace Maynard Cox was an American actor. He began his career as a standup comedian and then became the title character of the popular early U.S. television series Mister Peepers from 1952 to 1955. He also appeared as a character actor in over 20 films and dozens of television episodes. Cox was the voice of the animated canine superhero Underdog of the TV show of the same name.

Mister Peepers is an American sitcom that aired on NBC from July 3, 1952, to June 12, 1955.