Macaulay Culkin
Richie Rich
John Larroquette
Lawrence Van Dough
Edward Herrmann
Richard Rich
Christine Ebersole
Regina Rich
Jonathan Hyde
Herbert Cadbury
Michael Maccarone
Tony
Joel Robinson
Omar
Jonathan Hilario
Pee Wee
Rory Culkin
Young Richie
Michael McShane
Professor Keenbean
Chelcie Ross
Ferguson
Mariangela Pino
Diane Pazinski
Stephi Lineburg
Gloria Pazinski
Reggie Jackson
Baseball Coach
Claudia Schiffer
Aerobics Instructor
Rachel Stephens
Richie's Secretary
Frank Welker
Special Vocal Effects (voice)
Wanda Christine
Newswoman at Factory
Stacy Logan
Nash
Eddie Bo Smith Jr.
Ambler
Rob Riley
President
David Fawcett
Chauffeur
Dawn Maxey
Van Dough's Secretary
Ben Stein
Teacher