Christina Ricci
Kat
Bill Pullman
Dr. James Harvey
Cathy Moriarty
Carrigan
Eric Idle
Dibs
Malachi Pearson
Casper (voice)
Joe Alaskey
Stinkie (voice)
Joe Nipote
Stretch (voice)
Brad Garrett
Fatso (voice)
Devon Sawa
Casper on Screen
Chauncey Leopardi
Nicky
Spencer Vrooman
Andreas
Garette Ratliff Henson
Vic DePhillippi
Jessica Wesson
Amber Whitmire
Amy Brenneman
Amelia Harvey
Ben Stein
Mr. Rugg
Don Novello
Father Guido Sarducci
Terry Murphy
Terry Murphy ('Hard Copy')
Ernestine Mercer
Woman Being Interviewed
Doug Bruckner
Reporter (voice)
John Kassir
The Crypt Keeper (voice)
Wesley Thompson
Mr. Curtis
Michael Dubrow
Student #1
J.J. Anderson
Student #2
Jess Harnell
Arnold (voice)
Michael McCarty
Drunk in Bar
Micah Winkelspecht
Student
Mike Simmrin
Phantom
Dan Aykroyd
Dr. Raymond Stantz (uncredited)
Rodney Dangerfield
Rodney Dangerfield (uncredited)
Clint Eastwood
Clint Eastwood (uncredited)
Mel Gibson
Mel Gibson (uncredited)
Elise Main
Little Red Riding Hood (uncredited)
Bill Farmer
Fatso's Burping (uncredited)
Harry Shearer
Radio announcer (uncredited)