David Gallagher as Richie Rich

Eugene Levy as Professor Keenbean

Keene Curtis as Herbert Cadbury

Jake Richardson as Reggie Van Dough

Martin Mull as Richard Rich

Lesley Ann Warren as Regina Rich

Richard Fancy as Mr. Van Dough

Marla Maples as Mrs. Van Dough

Michelle Trachtenberg as Gloria

Blake Jeremy Collins as Freckles

Austin Stout as Pee Wee

Kathleen Freeman as Miss Peabody

Richard Riehle as Sgt. Mooney

Don McLeod as Irona/Evil Irona

Rex Smith as Rudy

Christopher Boyer as Hudson

Michael McDonald as Montgomery

Robert Peters as Hungry Officer

Candi Brough as Verva Twin #1

Randi Brough as Verva Twin #2

Billy Burnette as Nigel

Jim Jackman as Shorty

Janet Wood as Bank Teller

Claire Andrew as Baby Ritchie Rich

John Crane as Slim

Robert Hart as Mick

Lacey Taylor Robbins as Caitlin

Lex Robbins as Alex

Alfred Atienza as Cappy

Cody Weselis as Billy

Steven Cragg as Jeeves

Amy Kidd as Cynthia

Julianna Lavin as Sitcom Mom

Michael Bonnabel as Sitcom Dad

Sue Ellen Enright as TV Reporter

Ken Hanes as Anchorman

Tawny Fere as Neighbor

Jennifer Joyce as Servant

Rick Dean as Smark Bystander

Ken Odom as Angry Bystander

Preston Ahearn as Dismayed Bystander

Sharon Meyers as Pretty Bystander

Manny Fernandez as Salvation Army Guy

Manny Fernandez as Fast Shopper

Jennifer Shami as Slow Shopper

Larry Robbins as Jolly Santa

Patricia Elliott as Hazel

Tommy Woods as Smart Kid

Jotona Deason as Happy Kid

Nezben Deason as Good Looking Kid

Dan Fisher as Chief Officer

Joe Torrenueva as Prison Guard

Chrystina Myers as Driver

Shorty as Dollar

Rachel Duhame as Kid Near Car Hit (uncredited)

Phil Hawn as Neighbor (uncredited)

Carlton Preston as Bulter (uncredited)

Mary Ann Schmidt as Lab Scientist (uncredited)