Old-school magic meets the modern world when young Alex stumbles upon the mythical sword Excalibur. He soon unites his friends and enemies, and they become knights who join forces with the legendary wizard Merlin. Together, they must save mankind from the wicked enchantress Morgana and her army of supernatural warriors.
| Alexander "Alex" Elliot | Louis Ashbourne Serkis |
| Bedders | Dean Chaumoo |
| Lance | Tom Taylor |
| Kaye | Rhianna Dorris |
| Mrs. Elliot | Denise Gough |
| Merlin | Angus Imrie |
| Old Merlin | Patrick Stewart |
| Morgana | Rebecca Ferguson |
| Sophie | Genevieve O'Reilly |
| Mrs. Lee | Noma Dumezweni |
| Mr. Kepler | Nathan Stewart-Jarrett |
| Mr. Jeffreys | Mark Bonnar |
| Ms. Foster | Alexandra Roach |
| Mr. Hyde | Nick Mohammed |
| Stonehenge Tour Guide | Adam Buxton |
| Riding Instructor | Claudie Blakley |
| Punto Patty | Myra McFadyen |
| Policeman | Adam Leese |
| Policeman | Joey Ansah |
| Boy (uncredited) | Amir Wilson |
| Student Fighter | Sean Coleman |
The Kid Who Would Be King on Wikipedia
The Kid Who Would Be King on IMDb
