| Ryan O'Neal |
Barry Lyndon/Redmond Barry/Lt. Jonathan Fakenham/Lazlo Zilagy |
| Marisa Berenson |
Lady Lyndon, Countess of Lyndon, Vicountess of Bullington, Baroness Castle Lyndon of Ireland |
| Patrick Magee |
The Chevalier de Balibari, Barry's Patron |
| Hardy Krüger |
Captain Potzdorf, Nephew of Prussian Minister of Police (as Hardy Kruger) |
| Steven Berkoff |
Lord Ludd |
| Gay Hamilton |
Nora Brady, Barry's Cousin/Mrs. John Quin |
| Marie Kean |
Belle, Barry's Mother |
| Diana Körner |
Lischen, The German Girl (as Diana Koerner) |
| Murray Melvin |
Reverend Samuel Runt |
| Frank Middlemass |
Sir Charles Reginald Lyndon, Knight of the Bath, Minister to George III, Member of Parliament |
A gentlemanly rogue travels the battlefields and parlors of 18th century Europe determined to make for himself the life of a nobleman through...