James Young

Beau Brummel

Clara Kimball Young

Helen Ballarat

Charles Chapman

The Prince of Wales

Julia Swayne Gordon

The Duchess

Edwin R. Phillips

Lord Ballarat (as E.R. Phillips)

James Morrison

Lord Alvanley

Etienne Girardot

Isadore - Brummel's Valet

Richard Leslie

Lord Beaconsfield (as Dick Leslie)

Helene Costello

Child (uncredited)