Frank Welker

Curious George / Stig / Flint Quint (voice)

Jeff Bennett

The Man with the Yellow Hat / Stew (voice)

Grey DeLisle

Betsy / Photographer (voice)

E. G. Daily

Steve / Andie (voice)

Kath Soucie

Mrs. Renkins / Mint Quint / Mrs. Quint (voice)

Rob Paulsen

Charkie (voice)

Edie McClurg

Lydia / Mum / Lady (voice)

Jim Cummings

Jumpy Squirrel / Mr. Quint (voice)

Annie Mumolo

Bill / Sprint Quint (voice)