Frank Welker
Curious George (voice)
Jeff Bennett
The Man with the Yellow Hat / Mr. Rankins (voice)
Rino Romano
The Narrator (voice)
Carlos Alazraqui
Mr. Delgado / Luke / Gourds Gregory (voice)
Jim Cummings
Jumpy Squirrel / Mr. Quint / Maurice (voice)
Lara Jill Miller
Allie (voice)
Annie Mumolo
Bill (voice)
Cree Summer
Ada (voice)
Kath Soucie
Mrs. Rankins / Mrs. Quint (voice)