Patrick Stewart

Old Merlin

Alexandra Roach

Ms. Foster

Mark Bonnar

Mr. Jeffreys

Claudie Blakley

Riding Instructor

Nick Mohammed

Mr. Hyde

Adam Buxton

Stonehenge Tour Guide

Angus Imrie

Merlin

Rebecca Ferguson

Morgana

Myra McFadyen

Punto Patty

Genevieve O'Reilly

Sophie

Joey Ansah

Policeman

Louis Ashbourne Serkis

Alexander "Alex" Elliot

James Biddle

Executive Producer

Denise Gough

Mrs. Elliot

Rachael Prior

Executive Producer

Tom Taylor

Lance

Noma Dumezweni

Mrs. Lee

Dean Chaumoo

Bedders

Rhianna Dorris

Kaye

Nathan Stewart-Jarrett

Mr. Kepler

Adam Leese

Policeman

Amir Wilson

Boy (uncredited)

Sean Coleman

Student Fighter

Joe Cornish

Director