 Richard HarrisKing Arthur | King Arthur |
 Vanessa RedgraveGuenevere | Guenevere |
 Franco NeroLancelot Du Lac | Lancelot Du Lac |
 David HemmingsMordred | Mordred |
 Lionel JeffriesKing Pellinore | King Pellinore |
 Laurence NaismithMerlyn | Merlyn |
 Pierre OlafDap | Dap |
 Estelle WinwoodLady Clarinda | Lady Clarinda |
| GGary MarshalSir Lionel | Sir Lionel |
| AAnthony RogersSir Dinadan | Sir Dinadan |
 Peter BromilowSir Sagramore | Sir Sagramore |
 Sue CaseyLady Sybil | Lady Sybil |
| GGary MarshTom of Warwick | Tom of Warwick |
 Nicolas BeauvyKing Arthur as a Boy | King Arthur as a Boy |
| FFredric AbbottSir Geoffrey (uncredited) | Sir Geoffrey (uncredited) |
 Robert B. ShepardSoldier (uncredited) | Soldier (uncredited) |
| MMichael KilgarriffSir Paul (uncredited) | Sir Paul (uncredited) |
 Frank BakerPriest (uncredited) | Priest (uncredited) |
 Buddy BryanDancer (uncredited) | Dancer (uncredited) |
| LLorinne CrawfordDancer (uncredited) | Dancer (uncredited) |
 Leon GreeneSir Turloc (uncredited) | Sir Turloc (uncredited) |
| LLars HensenMinor Role (uncredited) | Minor Role (uncredited) |
| WWalter KightlyKnight of the Round Table (uncredited) | Knight of the Round Table (uncredited) |
| JJohn Hugh McKnightNobleman (uncredited) | Nobleman (uncredited) |
 Christopher RiordanSerf at Execution (uncredited) | Serf at Execution (uncredited) |
| KKay TapscottDancer (uncredited) | Dancer (uncredited) |
