Which Peanuts character calls Charlie Brown 'Chuck'?

Peppermint Patty calls Charlie Brown “Chuck.”

Peppermint Patty is a freckle-faced, athletic tomboy who first appeared in Peanuts in 1966. Her nickname for Charlie Brown is one of her clearest speech habits, giving their conversations a distinctive, informal tone. She treats him as a trusted friend and often turns to him for advice or companionship.

The name fits Peppermint Patty's direct personality. She captains a baseball team, is confident in sports, and speaks casually with nearly everyone. Her nickname also contrasts with Marcie's more formal “Charles,” another recurring way Peanuts shows how differently characters perceive Charlie Brown.

Readers sometimes confuse the answer with Marcie because Marcie also uses a special name for him. Marcie calls him “Charles,” while Peppermint Patty says “Chuck.” Lucy and Sally generally use Charlie Brown's familiar name rather than either nickname. Peppermint Patty's crush on Charlie Brown is another important part of their relationship, although she often expresses it through teasing, bluntness, or requests for his help.