Richard Harris as King Arthur

Vanessa Redgrave as Guenevere

Franco Nero as Lancelot Du Lac

David Hemmings as Mordred

Lionel Jeffries as King Pellinore

Laurence Naismith as Merlyn

Pierre Olaf as Dap

Estelle Winwood as Lady Clarinda

Gary Marshal as Sir Lionel

Anthony Rogers as Sir Dinadan

Peter Bromilow as Sir Sagramore

Sue Casey as Lady Sybil

Gary Marsh as Tom of Warwick

Nicolas Beauvy as King Arthur as a Boy

Fredric Abbott as Sir Geoffrey (uncredited)

Robert B. Shepard as Soldier (uncredited)

Michael Kilgarriff as Sir Paul (uncredited)

Frank Baker as Priest (uncredited)

Buddy Bryan as Dancer (uncredited)

Lorinne Crawford as Dancer (uncredited)

Leon Greene as Sir Turloc (uncredited)

Lars Hensen as Minor Role (uncredited)

Walter Kightly as Knight of the Round Table (uncredited)

John Hugh McKnight as Nobleman (uncredited)

Christopher Riordan as Serf at Execution (uncredited)

Kay Tapscott as Dancer (uncredited)