Curious George / Stig / Flint Quint (voice)
The Man with the Yellow Hat / Stew / Mr. Auger / Mr. Renkins / Wint Quint (voice)
The Narrator (voice)
Jumpy Squirrel / Mr. Quint (voice)
Steve / Andie (voice)
Betsy / Photographer (voice)
Allie / Balloonist (voice)
Bill / Sprint Quint (voice)
The Doorman / Hundley / Doxie Puppies (voice)
Lydia / Mom / Lady (voice)
Charkie (voice)
Mrs. Renkins / Mint Quint / Mrs. Quint (voice)
Abby (voice)
Rosita (voice)