Joe Dante Director Zach Galligan Billy Peltzer Actor Phoebe Cates Kate Beringer Actor John Glover Daniel Clamp Actor Robert Prosky Grandpa Fred Actor Robert Picardo Forster Actor Christopher Lee Doctor Catheter Actor Haviland Morris Marla Bloodstone Actor Dick Miller Murray Futterman Actor Jackie Joseph Sheila Futterman Actor Gedde Watanabe Mr. Katsuji Actor Keye Luke Mr. Wing Actor Kathleen Freeman Microwave Marge Actor Tony Randall Brain Gremlin Voice Dan Stanton Lewis Actor Don Stanton Martin Actor Howie Mandel Gizmo Voice Shawn Nelson Wally Actor Archie Hahn Forster's Technician Actor Leslie Neale Forster's Technician Actor Ron Fassler Forster's Technician Actor Time Winters Forster's Technician Actor Heather Haase Yogurt Jerk Actor Jason Presson Yogurt Jerk Actor Lisa Mende Yogurt Customer Actor Patrika Darbo Yogurt Customer Actor Jerry Goldsmith Yogurt Customer Actor, Original Music Rick Ducommun Security Guard Actor John Capodice Fire Chief Actor Belinda Balaski Movie Theatre Mom Actor Nicky Rose Movie Theatre Kid Actor Paul Bartel Theatre Manager Actor Kenneth Tobey Projectionist Actor Heidi Kempf TV Reporter Actor Eric Shawn TV Reporter Actor Michael Salort TV Reporter Actor Sarah Lilly Reporter in Lobby Actor Page Hannah Tour Guide #1 Actor Raymond Cruz Messenger Actor Julia Sweeney Peggy Actor Dale Swann Clamp Center Surveillance Supervisor Actor May Quigley Hallway Employee Actor Tony Winters Hallway Employee Actor Isiah Whitlock Jr. Jr. Fireman Actor Dean Norris Swat Team Leader Actor Saachiko Newsstand Lady Actor John Astin Janitor Actor Henry Gibson Employee Fired for Smoking Actor Charles S. Haas Screenwriter Kathleen Kennedy Executive Producer Frank Marshall Executive Producer Steven Spielberg Executive Producer Michael Finnell Producer Rick Baker Co-Producer John Hora Cinematographer Kent Beyda Film Editing Glenn Daniels Casting Marion Dougherty Casting James Spencer Production Design Joseph P. Lucky Art Director John Anderson Set Decoration Rosanna Norton Costume Design