Fatty's Magic Pants

Roscoe Arbuckle

Fatty

Minta Durfee

Fatty's Sweetheart

Harry McCoy

Fatty's Rival

Alice Davenport

Party Hostess

Phyllis Allen

Fatty's Mother

Glen Cavender

Cop (uncredited)

Charley Chase

Party Guest (uncredited)

Dixie Chene

Party Guest (uncredited)

Edward F. Cline

Doorman (uncredited)

Frank Opperman

Clothing Store Operator (uncredited)

Bert Roach

Party Guest (uncredited)

Al St. John

Party Guest (uncredited)