- Deborah Theaker
- Gwen Fabin-Blunt - Councilwoman
- Michael Hitchcock
- Steve Stark - Councilman
- Scott Williamson
- Tucker Livingston - Councilman
- Larry Miller
- Glenn Welsch - Mayor
- Don Lake
- Phil Burgess - Blaine Historian
- Christopher Guest
- Corky St. Clair
- Fred Willard
- Ron Albertson
- Catherine O'Hara
- Sheila Albertson
- Parker Posey
- Libby Mae Brown
- David Cross
- UFO Expert
- Eugene Levy
- Dr. Allan Pearl
- James McQueen
- Singing Auditioner
- Turk Pipkin
- Ping Pong Ball Juggler
- Jerry Turman
- Raging Bull Auditioner
- Bob Balaban
- Lloyd Miller
- Paul Dooley
- UFO Abductee
- Linda Kash
- Mrs. Allan Pearl
- Lewis Arquette
- Clifford Wooley
- Matt Keeslar
- Johnny Savage
- Brian Doyle-Murray
- Red Savage
- Miriam Flynn
- Costume Dresser
- Jill Parker-Jones
- Stage Manager
- Margaret Bowman
- Costume Designer
- Paul Benedict
- Not Guffman
- Jean Fuller
- Blaine Community Orchestra - Piano
- Paul Robertson
- Blaine Community Orchestra - Violin
- Richard Macdowell
- Blaine Community Orchestra - Clarinet
- Johnny Reno
- Blaine Community Orchestra - Saxophone
- Tracy Rosenkrans
- Blaine Community Orchestra - Bass
- CJ Vanston
- Blaine Community Orchestra - Trumpet, Timpani, Glockenspiel
- Tony Edwards
- Blaine Community Orchestra - Drums, Percussion
- Lou Christie
- Lightning Strikes Auditioner
- James Douglas
- Theater Attendant
- Daniel Fahey
- Dental Patient
- Shane Felux
- Dairy Queen Worker / Crowd (uncredited)
- Joseph T. Garrity
- TV Commercial Director
- Kathy Lamkin
- Beautiful Dreamer Auditioner
- Bob Odenkirk
- Caped Man at Auditions