Robin Williams as Rainbow Randolph

Edward Norton as Sheldon Mopes / Smoochy

Catherine Keener as Nora Wells

Danny DeVito as Burke Bennett

Jon Stewart as Marion Frank Stokes

Pam Ferris as Tommy Cotter

Danny Woodburn as Angelo Pike

Michael Rispoli as Spinner Dunn

Harvey Fierstein as Merv Green

Vincent Schiavelli as Buggy Ding Dong

Craig Eldridge as Husband

Judy White as Wife

Tim MacMenamin as Danny

Bruce McFee as Roy

Glen Cross as Jimmy

Bill Lake as Bartender

Nick Taylor as Henry the Thug

Richard Cocchiaro as Mitch the Thug

Tracey Walter as Ben Franks

Louis Giambalvo as Sonny Gordon

Colin Moult as Rhinette / Krinkle Kid #1

Nikolai Tichtchenko as Rhinette / Krinkle Kid #2

Martin Klebba as Rhinette/Krinkle #3

Tonya Reneé Banks as Rhinette / Krinkle Kid #4

Christy McGinity Gibel as Rhinette / Krinkle Kid #5

Philip Craig as Senator

Natasha Kinne as Smoochy's Secretary

Richard Hamilton as Old Vagrant

Shawn Byfield as Rickets

Todd Graff as Skip Kleinman

Melissa DiMarco as Tara

Dan Duran as Hunter

Michael Copeman as Reporter #1

James Carroll as Reporter #2

Phillip Jarrett as Reporter #3

Suzanne Leonard Feliz as Reporter #4

Thomas Lyons as Reporter #5

Angela Bullock as Reporter #6

Robert M. Sussman as Reporter #7

George Blumenthal as Reporter #8

Matthew Arkin as Save The Rhino Man

Hugo Jansuzian as Hispanic Dad

Silvia Rojas as Hispanic Mom

Mario Andres Torre as Hispanic Boy

Sabrina Jansuzian as Hispanic Girl

John 'Cha Cha' Ciarcia as Autograph Man

Fred Scialla as Man in Crowd

Adam Bryant as Man in Crowd #2

Richard Ziman as Man in Crowd #3

Frank Anello as NYPD

Samantha Cordero as Little Girl

Peter Keleghan as News Anchor

Rothaford Gray as Ellis

David Lawrence Brown as McCall

Gerry Quigley as Ian

James Binkley as Cop #1

Dylan Roberts as Stagehand

Vito Rezza as Lead Cop

Lou Cantres as Little Girl's Dad

John Cleland as John

Lauren Flanigan as Opera Diva

Cara Wakelin as Princess

Ted Kavouris as Candy Seller

Tony Ashmore as New Yorker on the Street (uncredited)

Antonio Cordero as Rainbow Randolph Friend (uncredited)

Jonah Falcon as Man (uncredited)

Frank Falcone as Man in crowd (uncredited)

Katie Finneran as Woman in Crowd (uncredited)

Edie Inksetter as Molly (uncredited)

Greg Korin as Smoochy Fan (uncredited)

Peter Kosaka as Takeshi Yamashita (uncredited)

Danny LeGare as Newsstand Clerk (uncredited)

Richard D. Leko as Smoochy Land Purple & White Monkey Keyboard Player (uncredited)

Peter Loung as Blue (uncredited)

Robert Mauzell as Security Guard at Methadone Clinic (uncredited)

Felicia Peluso as Woman in Park with Baby Carriage (uncredited)

Martin Pfefferkorn as Meth Addict at Clinic (uncredited)

Robert Prosky as Network Chairman (uncredited)