Sweetums is an ogre who first appeared on the television special "The Frog Prince" in 1971 as Tamanilla Grinderfall's ogre.
He later appeared in "The Muppet Show", several Muppet movies, among others.
He is not a villain in all Muppet productions. He is also a henchmonkey of the Wicked Witch (played by Miss Piggy) in The Muppets' Wizard of Oz.
He is performed by Carl Banas and Jerry Nelson, and later Richard Hunt, John Henson and Matt Vogel.