Sir James Bond
Played by: David Niven
A legendary British secret agent who had retired from the service, he is forced out of retirement to fight SMERSH, who have been eliminating agents. He is also none too pleased with the "sex maniac" who was given the name of "James Bond" in his place.
- Bunny-Ears Lawyer: In his first scene he's established as rather weird when he's left to his own devices, but more "wealthy and isolated eccentric" than the traditional character.
- Cool Old Guy: He's James Bond having entered senior age, which hasn't made him any less smooth.
- Muscles Are Meaningless: Exaggerated; despite his thin build he can break stone spheres that felled muscular highlanders.
- Retired Badass: He is retired from his work at the Secret Service at the beginning of the film. He's called out of it.
Played by: Peter Sellers
A baccarat expert who is recruited by Vesper Lynd under orders of Sir James Bond to beat SMERSH agent Le Chiffre at a game of baccarat.
Played by: Orson Welles
A SMERSH operative charged with recovering a large sum of their money after he lost it at the baccarat table, eventually returning to the table to try to win back the money.
- Beard of Evil: Le Chiffre here is lended the beard sported by later-age Orson Welles.
- Fat Bastard: Le Chiffre is a portly man here, which again comes from hiring Orson Welles. Actually Truer to the Text than the physically small Peter Lorre on the Climax! anthology or the lean, conventionally sexy Mads Mikkelsen in the 2006 movie.
- Wicked Cultured: Well, it turns out he doesn't have an art collection... but it's still Orson Welles in a white tuxedo. He even puts on an improbably elaborate magic show with the following claim:Le Chiffre: I present you with the levitation of Princess Ayisha... an illusion taught to me by an ancient vegetarian in the mountain fastnesses of Tibet...
Jimmy Bond / Dr. Noah
Played by: Woody Allen
Sir James Bond's bumbling nephew, also a British spy, assigned to the Caribbean. He developed a severe inferiority complex with regards of his uncle.
Played by: Ursula Andress
A former MI-6 secret agent who has since become a multi-millionaire. Sir James Bond, after assuming the position of M, head of MI-6, bribes her into returning to the service to recruit baccarat expert Evelyn Tremble into stopping Le Chiffre.
Played by: Barbara Bouchet
The secretary to the head of the British Secret Service. This Moneypenny, however, is actually the daughter of a previous Moneypenny, the one Sir James Bond worked with.
- Legacy Character: She's actually the daughter of the Moneypenny Sir James Bond worked with.
Played by: Joanna Pettet
The estranged daughter of Sir James Bond, born of his love affair with Mata Hari (yes, that Mata Hari). Bond persuades Mata to become an intelligence operative.
Played by: Jacqueline Bisset
A SMERSH operative and assassin in the employ of Le Chiffre who attempts to kill Evelyn Tremble at Casino Royale in a bid to prevent him from bankrupting her employer.
Agent Mimi / "Lady Fiona McTarry"
Played by: Deborah Kerr
When Sir James Bond travels to Scotland to return M's remains (it's a long story), he finds M's grieving widow, Lady Fiona McTarry. However, the real Lady Fiona has actually been replaced by SMERSH's Agent Mimi. After attempts by a bevy of beauties to seduce Bond and thus discredit him by destroying his "celibate image" fail, Mimi/Lady Fiona becomes so impressed with Bond that she changes loyalties and helps Bond to foil the plot against him.