Thomas Brodie-Sangster

as Firedrake (voice)

Freddie Highmore

as Ben (voice)

Felicity Jones

as Sorrell (voice)

Patrick Stewart

as Nettlebrand (voice)

Sanjeev Bhaskar

as Mad Doc (voice)

Nonso Anozie

as Mighty Djinn (voice)

Meera Syal

as Subisha Gulab (voice)

Alex Norton

as Gravelbeard (voice)

Peter Marinker

as Slatebeard (voice)

Stephen Hogan

as Spinecrackle (voice)

Glenn Wrage

as Bottleneck (voice)

Eric Meyers

as Sulphurbreath (voice)

William Vanderpuye

as Stonebeard (voice)

David Brooks

as Professor Greenbloom (voice)

Ewan Bailey

as Sorrel's Dad (voice)

Alison Dowling

as Sorrel's Mom (voice)

Glen McCready

as Granitface (voice)

Jimmy Hilbbert

as Twigleg (voice)