List of The Simpsons guest stars (seasons 1–20)

In addition to the show's regular cast of voice actors, celebrity guest stars have been a staple of The Simpsons, an American animated television sitcom created by Matt Groening for the Fox Broadcasting Company, since its first season. The Simpsons focuses on the eponymous family, which consists of Homer, Marge, Bart, Lisa and Maggie.

Source: Wikipedia — List of The Simpsons guest stars (seasons 1–20) (CC BY-SA 4.0)