Prince Mordred (or sometimes just Mordred) is the secondary antagonist in the 1981 live action fantasy film Excalibur.

He was portrayed by Charley Boorman as young Mordred, and by the late Robert Addie as an adult Mordred.

Biography[]

Morgana bears a son, Mordred, and Arthur sends his knights on a quest of restoring the land. Many of his knights die or are bewitched by Morgana. Perceval encounters shocked Perceval recognizes the man as Lancelot. 

Arthur gives him Excalibur, which  Arthur calls to Merlin, unknowingly awakening the wizard from his enchanted slumber. Merlin and Arthur then appears to Morgana as a shadow and tricks her into uttering the Charm of Making, producing a fog from the breath of the dragon, and exhausting her own magical powers that had kept her young. She rapidly ages and Mordred kills her, repulsed by the sight of his once beautiful mother now reduced to a decrepit old crone.

Arthur and Mordred benefiting from the fog that conceals their small size. Lancelot arrives unexpectedly, later Arthur and Lancelot reconcile and Lancelot dies with honor. Mordred stabs Arthur with a spear but Arthur further impales himself to get closer and kills Mordred with Excalibur.