Cast of Half Moon Street

Sigourney Weaver plays Dr. Lauren Slaughter, a clever and independent American woman who works as a high-class escort in London.

Michael Caine portrays Lord Sam Bulbeck, a British government official who becomes entangled in Dr. Lauren Slaughter's world.

Patrick Kavanagh appears as General Sir George Newhouse, a prominent military figure involved in the events surrounding Dr. Lauren Slaughter.

Faith Kent plays Lady Newhouse, the wife of General Sir George Newhouse, adding complexity to the story.

Ram John Holder takes on the role of Lindsay Walker, a character who influences Dr. Lauren Slaughter's decisions.

Keith Buckley portrays Hugo Van Arkady, a mysterious figure who plays a part in the unfolding events.

Nadim Sawalha depicts Karim Hatami, a character connected to Dr. Lauren Slaughter's world.

Vincent Lindon appears as Sonny, adding a different perspective to the interactions in the movie.

Maria Aitken plays The Hon. Maura Hardcastle, a character with her own agenda in the story.

Donald Pickering portrays George Hardcastle, a significant figure with ties to the unfolding events.

Angus MacInnes plays Bill Rafferty, a character who contributes to the plot development.

Rupert Vansittart depicts Alan Platts-Williams, a character intertwined with the happenings surrounding Dr. Lauren Slaughter.