Captain George Bryan Brummell is a British soldier who appreciates fine clothing and innovative dress. Although he initially alienates the Prince of Wales with insulting comments about the prince's uniform designs, he eventually becomes his close confidant. Brummel also falls in love with the beautiful Lady Patricia Belham. However, his outspoken manner eventually leads to his being exiled to France.
| Actor | Role |
|---|---|
 Stewart GrangerBeau Brummell | Beau Brummell |
 Elizabeth TaylorLady Patricia | Lady Patricia |
 Peter UstinovGeorge, Prince of Wales | George, Prince of Wales |
 Robert MorleyKing George III | King George III |
 James DonaldLord Edwin Mercer | Lord Edwin Mercer |
 James HayterMortimer | Mortimer |
 Rosemary HarrisMrs. Fitzherbert | Mrs. Fitzherbert |
 Paul RogersWilliam Pitt | William Pitt |
 Noel WillmanLord Byron | Lord Byron |
 Peter DyneleyMidger | Midger |
 Charles CarsonSir Geoffrey Baker | Sir Geoffrey Baker |
 Ernest ClarkDr. Warren | Dr. Warren |
 Peter BullMr. Fox | Mr. Fox |
 Mark DignamMr. Burke | Mr. Burke |
 Desmond RobertsColonel | Colonel |
 David HorneThurlow | Thurlow |
 Ralph TrumanSir Ralph Sidley | Sir Ralph Sidley |
| GGeorge De WarfazDr. Dubois | Dr. Dubois |
 Henry OscarDr. Willis | Dr. Willis |
 Harold KasketMayor | Mayor |
| HHoward LangHecker (uncredited) | Hecker (uncredited) |