- Sara Rue
- Â Claude Casey 81 episodes, 2002-2006
- Zachary Levi
- Â Kipp Steadman 81 episodes, 2002-2006
- Andrea Parker
- Â Lydia Weston 81 episodes, 2002-2006
- Andy Dick
- Â Owen Kronsky 81 episodes, 2002-2006
- Sherri Shepherd
- Â Ramona Platt 80 episodes, 2002-2006
- Eric Roberts
- Â Will Butler 65 episodes, 2002-2005
- Will Sasso
- Â Carl Monari 61 episodes, 2003-2006
- Patrick Warburton
- Â Jeb Denton 49 episodes, 2003-2006
- Josh Braaten
- Â Charlie / ... 8 episodes, 2002-2005
- Jim Marshall
- Â Worker / ... 5 episodes, 2003-2006
- William Ragsdale
- Â Mitch Calgrove 4 episodes, 2004
- Christopher Mauldin
- Â Mail Guy / ... 2 episodes, 2003-2005
- Jenny McCarthy-Wahlberg
- Â Dani 3 episodes, 2003
- George Wyner
- Â Alan Turnbach 3 episodes, 2003-2006
- John Eric Bentley
- Â Director / ... 3 episodes, 2002-2006
- French Stewart
- Â Gene Schmidtline 3 episodes, 2003-2005
- Andrew Hunter Sherman
- Â Wyatt 1 episode, 2004-2006
- Diana Maria Riva
- Â Vivian 3 episodes, 2004-2005
- Jonna Tamases
- Â Irene 3 episodes, 2006
- Nicole Sullivan
- Â Deirdre / ... 2 episodes, 2003
- Michael Boatman
- Â Ted Elliot 2 episodes, 2003
- Star Jones
- Â Dr. Curtis 2 episodes, 2005
- Zaid Farid
- Â Security Guard 2 episodes, 2002
- Gil Zuniga
- Â Nello / ... 2 episodes, 2004
- Stefan Marks
- Â Stage Manager 2 episodes, 2002-2004
- Joanna Kerns
- Â Judy, Owen's Other Mom 2 episodes, 2003-2004
- Michael Angarano
- Â George Denton 2 episodes, 2004
- Joe Liss
- Â Dr. Stokely 2 episodes, 2005
- Janiece Jary
- Â Nursery School Teacher / ... 1 episode, 2002-2003
- Valerie Harper
- Â Judith, Owen's Mom 2 episodes, 2003-2004
- Anne Dudek
- Â Annie 2 episodes, 2004
- Michele Chele Stanton
- Â Kelly 2 episodes
- Jim Rash
- Â Rob McLyle 1 episode, 2002
- Martin Mull
- Â Buddy Casey 1 episode, 2002
- Sean Whalen
- Â Phillip 1 episode, 2002
- Noel Gugliemi
- Â Marco 1 episode, 2002
- Caroline Aaron
- Â Roz 1 episode, 2002
- Julie Claire
- Â Receptionist 1 episode, 2002
- Mike Randleman
- Â Waiter 1 episode, 2002
- Aaron Buerge
- Â Oliver 1 episode, 2002
- Coburn Hartsell
- Â Troy 1 episode, 2002
- Bob Odenkirk
- Â Colin Hunter 1 episode, 2003
- Cindy Williams
- Â Joan Casey 1 episode, 2002
- Ali Hillis
- Â Tiffany 1 episode, 2002
- Carole Davis
- Â Mrs. Butler 1 episode, 2002
- Jonathan Bray
- Â Delivery Guy 1 episode, 2002
- Angela Sargeant
- Â Trina 1 episode, 2002
- Michael Burger
- Â Man 1 episode, 2002
- Darrell Alston
- Â Piano Player 1 episode, 2002
- Kat Dennings
- Â Kaitlin 1 episode, 2003
- Pamela Anderson
- Â Vicki Devorski 1 episode, 2003
- Joanna Cassidy
- Â Norma 1 episode, 2003
- Ben Feldman
- Â Nicholas 1 episode, 2003
- Barry Bostwick
- Â Max Damarius 1 episode, 2003
- Mo Collins
- Â Toni St. George 1 episode, 2003
- Eddie McClintock
- Â Jake Heberling 1 episode, 2003
- Vincent Pastore
- Â Bookie 1 episode, 2003
- Connie Ray
- Â Nona 1 episode, 2003
- Beth Stern
- Â Joelle 1 episode, 2003
- Trista Sutter
- Â Trista 1 episode, 2003
- Brooke Totman
- Â Joanie Squillante 1 episode, 2003
- Vernard 'Bone' Hampton
- Â Bakery Clerk 1 episode, 2003
- Tinsley Grimes
- Â Penny 1 episode, 2002
- Joleen Lutz
- Â Instructor 1 episode, 2002
- Benjamin King
- Â Tom 1 episode, 2002
- John O'Brien
- Â Executive 1 episode, 2002
- Lawrence LeJohn
- Â Executive 1 episode, 2002
- Anthony Louis Lee
- Â Liam Turnbach 1 episode, 2002
- Danielle Bisutti
- Â Sales Lady 1 episode, 2003
- J.P. Manoux
- Â Peter 1 episode, 2003
- Gordon Clapp
- Â Detective Martin 1 episode, 2003
- Don Calfa
- Â Uncle Nicky 1 episode, 2003
- Chris Gartin
- Â Trevor 1 episode, 2003
- Ana Rey
- Â Assistant 1 episode, 2003
- Howard S. Miller
- Â Executive #1 1 episode, 2003
- Caryne Shea
- Â Saleswoman 1 episode, 2003
- Janell Inez
- Â Saleswoman 1 episode, 2003
- Phil Dicker
- Â Man 1 episode, 2003
- Lesley Ann Warren
- Â Diane Steadman 1 episode, 2004
- Jim Belushi
- Â Eddie Smirkoff 1 episode, 2004
- Bryan Callen
- Â Peter 1 episode, 2004
- Tori Spelling
- Â Roxanne Fiedler 1 episode, 2004
- Suzanne Kent
- Â Madeline 1 episode, 2004
- Tony Perkins
- Â Tony Perkins 1 episode, 2004
- Mike Siegel
- Â New Potato Guy 1 episode, 2002
- Joseph G. Medalis
- Â Older Executive 1 episode, 2002
- Randee Heller
- Â Mrs. Ross 1 episode, 2003
- Stephen Lee
- Â Store Owner 1 episode, 2003
- Marcy Goldman
- Â Female Employee 1 episode, 2003
- Alex Craig Mann
- Â Waiter 1 episode, 2003
- DJ Rabiola
- Â Bouncer 1 episode, 2003
- Cynthia Preston
- Â Monique 1 episode, 2004
- Brooke Burke
- Â Nurse Benson 1 episode, 2004
- John McEnroe
- Â John McEnroe 1 episode, 2004
- Bill Walton
- Â Bill Walton 1 episode, 2004
- Kristin Bauer
- Â Kaye Buchinski 1 episode, 2005
- Christopher Knight
- Â Waiter 1 episode, 2005
- Jennifer Echols
- Â Cafeteria Worker 1 episode, 2002
- Sean Moran
- Â Party Guy #1 1 episode, 2002
- Kevin Bowens
- Â Guy #1 1 episode, 2002
- Nicole Myree
- Â Janelle 1 episode, 2002
- Kathryn Joosten
- Â Old Lady 1 episode, 2003
- Martin Papazian
- Â Delivery Person 1 episode, 2003
- Teresa Parente
- Â Receptionist 1 episode, 2003
- Robin Braxton
- Â Mrs. Conlin 1 episode, 2003
- Dondré T. Whitfield
- Â William 1 episode, 2004
- Tom Goodman
- Â Lamb Toy 1 episode, 2004
- Anjua Warfield-Maximo
- Â Julia 1 episode, 2004
- Alex Skuby
- Â Fran 1 episode, 2005
- Steven Basil
- Â Guy #2 1 episode, 2002
- Simon Helberg
- Â Arthur 1 episode, 2003
- Jason Huber
- Â Strange Man 1 episode, 2003
- David Weisenberg
- Â Male Employee 1 episode, 2003
- Nikki Ziering
- Â Gloria 1 episode, 2004
- Jonathan Tipton Meyers
- Â Maitre D' 1 episode, 2004
- Vanessa Evigan
- Â Sandy 1 episode, 2003
- Stephanie Childers
- Â Jane 1 episode, 2004
- Joseph Stephens Jr.
- Â Feeler 1 episode, 2004
- Pat Finn
- Â Luke McNamara 1 episode, 2002
- Rina Mondragon
- Â Strip Aerobics Girl #4 1 episode, 2002
- Richard Ruccolo
- Â Bobby Casey 1 episode, 2003
- Esther Scott
- Â Interviewer 1 episode, 2003
- Tricia Kean
- Â Reporter 1 episode, 2003
- Leonard C. Jones
- Â Aaron Carter 1 episode, 2003
- Kaley O'Kelly
- Â Reporter 1 episode, 2003
- Todd Tongen
- Â Reporter 1 episode, 2003
- Mike Anderson
- Â Reporter 1 episode, 2003
- Lucy Lawless
- Â Tracy Fletcher 1 episode, 2004
- Richard Kind
- Â Lance Corcoran 1 episode, 2004
- John DiMaggio
- Â Bartender 1 episode, 2004
- Erik Palladino
- Â Mike Abrejo 1 episode, 2004
- Will Friedle
- Â Caleb 1 episode, 2004
- Harry Groener
- Â Dr. Lars Skaarsgard 1 episode, 2004
- Jerry Lambert
- Â Dr. Altman 1 episode, 2004
- Chris Hogan
- Â Andrew 1 episode, 2004
- Giuliana Rancic
- Â Journalist 1 episode, 2004
- Christopher T. Wood
- Â Photographer 1 episode, 2004
- Jane Edith Wilson
- Â Customer 1 episode, 2004
- Jon Collins
- Â Office Worker #1 1 episode, 2004
- Alissa Dean
- Â Genie 1 episode, 2004
- Darlene Kardon
- Â Mavis 1 episode, 2004
- Ricky Reidling
- Â Paramedic 1 episode, 2004
- Isabel Shaw
- Â Elevator girl 1 episode, 2004
- Simon Harvey
- Â Hotel Manager 1 episode, 2004
- Pat Dade
- Â Cashier 1 episode, 2004
- Dennis Cruzado
- Â Bobby 1 episode, 2004
- Floreda Cooks
- Â Office Worker #2 1 episode, 2004
- Krishna Asani
- Â Joyce 1 episode, 2004
- Malia Grayham
- Â Makeup Artist 1 episode, 2004
- Kimberly Williams-Paisley
- Â Laura 1 episode, 2005
- Jim O'Heir
- Â Russell 1 episode, 2005
- Masi Oka
- Â Hideki 1 episode, 2005
- David Cassidy
- Â Vince 1 episode, 2005
- Joan Rivers
- Â Louise 1 episode, 2005
- Danny Bonaduce
- Â Ron 1 episode, 2005
- Paula Abdul
- Â Kathleen 1 episode, 2005
- Natasha Alam
- Â Daniella 1 episode, 2005
- Regis Philbin
- Â Xin Xao Pi 1 episode, 2005
- Mark Curry
- Â Morpheus 1 episode, 2005
- Sonya Eddy
- Â Security Woman 1 episode, 2005
- Rolando Molina
- Â Security Man 1 episode, 2005
- Michael Moloney
- Â Michael Moloney 1 episode, 2005
- Tracy Hutson
- Â Tracy Hutson 1 episode, 2005
- David Muller
- Â Man 1 episode, 2005
- Paul DiMeo
- Â Paul DiMeo 1 episode, 2005
- Carole Goldman
- Â Saleswoman Marie 1 episode, 2005
- Alexandra Ackerman
- Â Bridget 1 episode, 2005
- Phil Gordon
- Â Dealer 1 episode, 2005
- Rodrick Goins
- Â Karaoke Singer 1 episode, 2005
- Bruce Dent
- Â Art Critic 1 episode, 2005
- Alison Marshall
- Â Woman 1 episode, 2005
- Joey McIntyre
- Â Ethan 1 episode, 2006
- Roger Lundblade
- Â Photographer 1 episode, 2006
- James McMann
- Â Bar Patron 1 episode, 2006
- T.L. Simon
- Â Waiter 1 episode, 2006
- Kimberely Simonetti
- Â Neighbor 1 episode, 2006
- Tony Plana
- Â Owl Inspector 1 episode
- Lawrence Gilliard Jr.
- Â Chester 1 episode
- Charles C. Stevenson Jr.
- Â Earl 1 episode
- Ezra Godden
- Â Justin 1 episode
- Bob Brunson
- Â Johnny 1 episode
- Anthony Liebetrau
- Â Man in Line 1 episode
- Mike Kartman
- Â Guy in Elevator / ... (uncredited) 2 episodes, 2003
- Tammie Baird
- Â Beautiful Woman (uncredited) 1 episode, 2002
- Tom Hertz
- Â Party Guy #2 (uncredited) 1 episode, 2002
- Margaret Easley
- Â Cassidy (uncredited) 1 episode, 2003
- Hope Banks
- Â Woman in Elevator (uncredited) 1 episode, 2003
- David Hanson
- Â Extra (uncredited) 1 episode, 2003
- Tarita Virtue
- Â Bar Trivia Contestant (uncredited) 1 episode, 2004
- D.J. Feldman
- Â Bar Trivia Contestant (uncredited) 1 episode, 2004
- Kristen Hagen
- Â Office Worker (uncredited) 1 episode, 2004