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