Buster Keaton as Professor Post

Jimmy Durante as James

Ruth Selwyn as Pansy Peets

Thelma Todd as Eleanor Espere

Hedda Hopper as Mrs. Peets

William Pawley as Griffo

Sidney Toler as Stage Director

Lawrence Grant as Dr. Bolton

Henry Armetta as Tony

Edward Brophy as Reno

Sidney Bracey as Jenkins

Fred Kelsey as Process Server