Tyler Bowman as James (Live-action)
Petrie as James (Anthropomorphic)
The Spy from Apartment 8-I as Aunt Sponge
Hildy Gloom as Aunt Spiker
Grunkle Stan as The Old Man
Ms. Bowman as James’s parents
Meddlen Meadows as Grasshopper
Queen Delighful as Miss spider
Jeff the spider as Earthworm
Lord Hater as The skeleton captain
Vlad as The skeleton pirates