Madeline Carroll

Widget (voice)

Freddie Highmore

Astro Boy (voice)

Kristen Bell

Cora (voice)

Moisés Arias

Zane (voice)

Alan Tudyk

Ronnie (voice)

Dee Bradley Baker

Trashcan (voice)

Sterling Beaumon

Sludge (voice)

David Feiss

Testo (voice)