Robert Downey Jr. as Robert Merivel

Meg Ryan as Katharine

Sam Neill as King Charles II

David Thewlis as John Pearce

Hugh Grant as Elias Finn

Polly Walker as Celia Clemence

Ian McKellen as Will Gates

Ian McDiarmid as Ambrose

Mary MacLeod as Midwife

Willie Ross as Man with Visible Heart

Benjamin Whitrow as Merivel's Father

Roger Ashton-Griffiths as Mr. Bung

Andrew Havill as Gallant

Tony Gardner as Gallant

David Ryall as Lord Bathurst

Mark Letheren as Daniel

Sandy McDade as Hannah

Rosalind Bennett as Eleanor

David Gant as Chaffinch

Neville Watchurst as Latin Doctor

Bryan Pringle as Watchman

Roy Evans as Fleeing Man

John Quarmby as The Chancellor

John Dallimore as The Secretary

Janan Kubba as Pretty Wench

Henrietta Voigts as Female Patient

Simon Taylor as Second Doctor

Selina Giles as Fair Lady

Susanne McKenrick as Dark Lady

Nicholas Hutchison as Pinworth

Jenny Runacre as Painted Lady

Arne Nannestad as Party Guest

Graham Valentine as Dandy

Anna Savva as Celia's Maid

Claire Russell as Sick Girl

Steven Beard as Messenger

Simon Carter as Messenger

Philip Babot as Whittlesea Dancer

Ena Cohen as Whittlesea Dancer

Dylan Davies as Whittlesea Dancer

Russell Gomer as Whittlesea Dancer

Caroline Lamb as Whittlesea Dancer

Jessica Cohen as Whittlesea Dancer

Stephen Fisher as Whittlesea Dancer

Frank Rozelaar-Green as Whittlesea Dancer

Bernadette Iglich as Court Dancer

Philippa Luce as Court Dancer

Wendy Woodbridge as Court Dancer