Sherlock Jr.

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)

George Davis

Conspirator (uncredited)

Kewpie Morgan

Conspirator (uncredited)

Steve Murphy

Conspirator (uncredited)

John Patrick

Conspirator (uncredited)