Sherlock Junior

Buster Keaton

Projectionist / Sherlock, Jr.

Kathryn McGuire

The Girl

Joe Keaton

The Girl's Father / Man on Film Screen

Erwin Connelly

The Hired Man / The Butler

Ward Crane

The Local Sheik / The Villain

Doris Deane

Girl Who Loses Dollar Outside Cinema (uncredited)

Christine Francis

Candy Store Girl (uncredited)

George Davis

Conspirator (uncredited)

Kewpie Morgan

Conspirator (uncredited)

Steve Murphy

Conspirator (uncredited)

John Patrick

Conspirator (uncredited)

Betsy Ann Hisle

Little Girl (uncredited)