• 
  Brad Silberling

  regizor

• 
  Sherri Stoner

  scenarist

• 
  Bill Pullman

  dr. Harvey
• 
  Christina Ricci

  Kathleen Harvey
• 
  Cathy Moriarty

  Carrigan Crittenden
• 
  Mel Gibson

  Mel Gibson
• 
  Eric Idle

  Paul 'Dibbs' Plutzker
• 
  Chauncey Leopardi

  Nicky

• 
  Dan Aykroyd

  Dr. Raymond Stantz
• 
  Devon Sawa

  Casper on Screen
• 
  Amy Brenneman

  Amelia Harvey
• 
  Joe Nipote

  Stretch
• 
  John Kassir

  The Crypt Keeper
• 
  Ben Stein

  Mr. Rugg
• 
  Joe Alaskey

  Stinkie

• 
  Garette Ratliff Henson

  Vic DePhillippi
• 
  Don Novello

  Father Guido Sarducci
• 
  Brad Garrett

  Fatso
• 
  Ernestine Mercer

  Harvey Patient Being Interviewed
• 
  Jess Harnell

  Arnold
• 
  Doug Bruckner

  Reporter (voice) (as Douglas J.O. Bruckner)
• 
  Terry Murphy

  Herself ('Hard Copy')
• 
  Malachi Pearson

  Casper (McFadden)
• 
  Fred Rogers

  Mr. Rogers
• 
  Spencer Vrooman

  Andreas