Richard Dreyfuss
Centipede (voice)
Simon Callow
Grasshopper (voice)
Susan Sarandon
Miss Spider (voice)
Pete Postlethwaite
The Magic Man
Mike Starr
Cop
Miriam Margolyes
Aunt Sponge / Glowworm (voice)
David Thewlis
Earthworm (voice)
Kathryn Howell
Woman in Bathrobe
Joanna Lumley
Aunt Spiker
Jeff Bennett
Centipede (singing voice) (uncredited)
Steven Culp
James' Father
Paul Terry
James Henry Trotter
Jeff Mosley
Hard Hat Man