Don't Weaken!: Cast
Ford Sterling
Professor Yonson - the Dancing Master
James Finlayson
Lightfingered Luke - Professor Yonson's Assistant
Charles Murray
Frank Reilly
Fanny Kelly
Reilly's Wife
Harriet Hammond
Reilly's Daughter
Joseph Belmont
Reilly's Daughter's Beau
Billy Armstrong
The Pianist (uncredited)
Lige Conley
Reilly's Poker Pal (uncredited)
Al Cooke
The Butler (uncredited)
Virginia Fox
Dance Pupil (uncredited)
Eddie Gribbon
Dance Pupil (uncredited)
Patrick Kelly
The Timekeeper (uncredited)
Gordon Lewis
Dance Pupil (uncredited)
Charlotte Mineau
Party Guest (uncredited)
Kalla Pasha
Dance Pupil (uncredited)
John Rand
The Cop (uncredited)
Tiny Ward
Reilly's Poker Pal (uncredited)