Robin Williams
Hunter "Patch" Adams
Monica Potter
Carin Fisher
Philip Seymour Hoffman
Mitch Roman
Daniel London
Truman Schiff
Bob Gunton
Dean Walcott
Harve Presnell
Dean Anderson
Peter Coyote
Bill Davis
Michael Jeter
Rudy
Josef Sommer
Dr. Eaton
Irma P. Hall
Joletta
Barry Shabaka Henley
Emmet
Frances Lee McCain
Judy
Daniella Kuhn
Adelane
James Greene
Bile
Harold Gould
Arthur Mendelson
Bruce Bohne
Trevor Beene
Harry Groener
Dr. Prack
Steven Anthony Jones
Charlie
Richard Kiley
Dr. Titan
Douglas Roberts
Larry
Ellen Albertini Dow
Aggie
Alan Tudyk
Everton
Ryan Hurst
Neil
Peter Siteri
Chess Man
Don West
Instructor
Greg Sestero
Jaime
Jason Aaron Baca
Patch Pirate
Ismael 'East' Carlo
Hispanic Father
Diane Amos
Older Waitress
Andy Arness
Orderly (uncredited)
Renee Rogers
Receptionist
Dot-Marie Jones
Miss Meat