cast
- Richard Harris
- Oliver Cromwell
- Alec Guinness
- Charles I
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- Robert Morley
- Earl of Manchester
- Dorothy Tutin
- Queen Henrietta Maria
- Frank Finlay
- John Carter
- Timothy Dalton
- Prince Rupert
- Patrick Wymark
- Earl of Strafford
- Patrick Magee
- Hugh Peters
- Nigel Stock
- Sir Edward Hyde
- Charles Gray
- The Earl of Essex
- Michael Jayston
- Henry Ireton
- Richard Cornish
- Oliver Cromwell
- Anna Cropper
- Ruth Carter
- Michael Goodliffe
- Solicitor General
- Jack Gwyllim
- General Byron
- Basil Henson
- Hacker
- Patrick Holt
- Capt. Lundsford
- Stratford Johns
- President Bradshaw
- Geoffrey Keen
- John Pym
- Anthony May
- Richard Cromwell
- Ian McCullough
- John Hampden
- John Paul
- Gen. Digby
- Llewellyn Rees
- The Speaker
- Robin Stewart
- Prince of Wales
- Andre Van Gyseghem
- Archbishop Riniuccini
- Zena Walker
- Mrs. Cromwell
- Douglas Wilmer
- Thomas Fairfax
- Anthony Kemp
- Henry Cromwell
- Stacy Dorning
- Mary Cromwell
- Melinda Churcher
- Bridget Cromwell
- George Merritt
- Old Man William
- Gerald Rowland
- Drummer Boy
- Josephine Gillick
- Elizabeth Cromwell
- Patrick O'Connell
- John Lilburne
- John Welsh
- Bishop Juxon
- Bryan Pringle
- Trooper Hawkins
crew
- Ken Hughes
- Director, Screenwriter
- Andrew Donally
- Producer, Associate Producer
- Irving Allen
- Producer
- Ronald Harwood
- Screenwriter
- Geoffrey Unsworth
- Cinematographer
- Frank Cordell
- Composer (Music Score)
- Bill Lenny
- Editor
- John Stoll
- Production Designer
- Herbert Westbrook
- Art Director
- Arthur Taksen
- Set Designer
- Vittorio Nino Novarese
- Costume Designer
- Bill Warrington
- Special Effects
- Ted Sturgis
- First Assistant Director
- Gerry Crampton
- Stunts, Stunts Coordinator
