John Barrymore as Gordon Bryon 'Beau' Brummel

Mary Astor as Lady Margery Alvanley

Willard Louis as Prince of Wales

Carmel Myers as Lady Hester Stanhope

Irene Rich as Frederica Charlotte, Duchess of York

Alec B. Francis as Mortimer

Richard Tucker as Lord Stanhope

George Beranger as Lord Byron

William Humphrey as Lord Alvanley

Clarissa Selwynne as Mrs. Wertham

John J. Richardson as Poodles Byng

Claire de Lorez as Lady Manly

Michael Dark as Lord Manly

Templar Saxe as Desmond Wertham

James A. Marcus as Snodgrass the Innkeeper