Mark Waters Director, Executive Producer Jim Carrey Mr. Popper Actor Carla Gugino Amanda Actor Angela Lansbury Mrs. Van Gundy Actor Ophelia Lovibond Pippi Actor Madeline Carroll Janie Actor Clark Gregg Nat Jones Actor Jeffrey Tambor Mr. Gremmins Actor David Krumholtz Kent Actor Philip Baker Hall Franklin Actor Maxwell Perry Cotton Billy Actor James Tupper Rick Actor Dominic Chianese Reader Actor William Charles Mitchell Yates Actor Henry Keleman Young Tommy Popper Actor Kelli Barrett Tommy's Mom Actor Desmin Borges Daryl Actor Sean Anders Screenwriter John Morris Screenwriter Jared Stern Screenwriter John Davis Producer Jessica Tuchinsky Executive Producer Derek Dauchy Executive Producer Joel Gotler Executive Producer Florian Ballhaus Cinematographer Bruce Green Film Editing Rolfe Kent Original Music Stuart Wurtzel Production Design Patricia Woodbridge Art Director Ellen Christiansen De Jonge Set Decoration Ann Roth Costume Design Marci Liroff Casting Kathleen Chopin Casting