Louis Ashbourne Serkis
Alexander "Alex" Elliot
Acting
Dean Chaumoo
Bedders
Acting
Tom Taylor
Lance
Acting
Rhianna Dorris
Kaye
Acting
Denise Gough
Mrs. Elliot
Acting
Angus Imrie
Merlin
Acting
Patrick Stewart
Old Merlin
Acting
Rebecca Ferguson
Morgana
Acting
Genevieve O'Reilly
Sophie
Acting
Noma Dumezweni
Mrs. Lee
Acting
Nathan Stewart-Jarrett
Mr. Kepler
Acting
Mark Bonnar
Mr. Jeffreys
Acting
Alexandra Roach
Ms. Foster
Acting
Nick Mohammed
Mr. Hyde
Acting
Adam Buxton
Stonehenge Tour Guide
Acting
Claudie Blakley
Riding Instructor
Acting
Myra McFadyen
Punto Patty
Acting
Adam Leese
Policeman
Acting
Joey Ansah
Policeman
Acting
Amir Wilson
Boy (uncredited)
Acting