Richard Harris

King Arthur

Vanessa Redgrave

Guenevere

Franco Nero

Lancelot Du Lac

David Hemmings

Mordred

Lionel Jeffries

King Pellinore

Laurence Naismith

Merlyn

Pierre Olaf

Dap

Estelle Winwood

Lady Clarinda

Peter Bromilow

Sir Sagramore

Sue Casey

Lady Sybil

Nicolas Beauvy

King Arthur as a Boy

Robert B. Shepard

Soldier (uncredited)

Frank Baker

Priest (uncredited)

Buddy Bryan

Dancer (uncredited)

Leon Greene

Sir Turloc (uncredited)

Christopher Riordan

Serf at Execution (uncredited)