| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Aaron Carter | Cast | Actor | Self - Guest | 1 |
 Adam Rodriguez | Cast | Actor | Self - Guest | 1 |
 Adrian Pasdar | Cast | Actor | Self - Guest | 1 |
 Ahmet Zappa | Cast | Actor | Self - Guest | 1 |
 Alfre Woodard | Cast | Actress | Self - Guest | 1 |
 Alison Lohman | Cast | Actress | Self - Guest | 1 |
 Allison Janney | Cast | Actress | Self - Guest | 1 |
 Alyson Hannigan | Cast | Actress | Self - Guest | 1 |
 Amy Sedaris | Cast | Actress | Self - Guest | 1 |
 Amy Smart | Cast | Actress | Self - Guest | 1 |
 Andrea Bowen | Cast | Actress | Self - Guest | 1 |
 Anne Heche | Cast | Actress | Self - Guest | 1 |
 Antonio Sabàto, Jr. | Cast | Actor | Self - Guest | 1 |
 Audra McDonald | Cast | Actress | Self - Guest | 1 |
 Barry Manilow | Cast | Actor | Self - Musical Guest | 1 |
 Beau Bridges | Cast | Actor | Self - Guest | 1 |
 Billy Ray Cyrus | Cast | Actor | Self - Guest | 1 |
 Bob Saget | Cast | Actor | Self - Guest | 1 |
 Bradley Whitford | Cast | Actor | Self - Guest | 1 |
 Brenda Strong | Cast | Actress | Self - Guest | 1 |
 Camryn Manheim | Cast | Actress | Self - Guest | 1 |
 Carol Burnett | Cast | Actress | Self - Guest | 1 |
 Carrie Fisher | Cast | Actress | Self - Guest | 1 |
 Catherine Lloyd Burns | Cast | Actress | Self - Guest | 1 |
 Chandra Wilson | Cast | Actress | Self - Guest | 1 |
 Cheryl Hines | Cast | Actress | Self - Guest | 2 |
 Chris Noth | Cast | Actor | Self - Guest | 2 |
 Christine Taylor | Cast | Actress | Self - Guest | 1 |
 Cloris Leachman | Cast | Actress | Self - Guest | 1 |
 Connie Britton | Cast | Actress | Self - Guest | 1 |
 Constance Zimmer | Cast | Actress | Self - Guest | 1 |
 Craig Bierko | Cast | Actor | Self - Guest | 1 |
 Daniel Dae Kim | Cast | Actor | Self - Guest | 1 |
 Daryl Hall | Cast | Actor | Self - Musical Guest | 2 |
 David Boreanaz | Cast | Actor | Self - Guest | 1 |
 David Conrad | Cast | Actor | Self - Guest | 1 |
 David Hyde Pierce | Cast | Actor | Self - Guest | 1 |
 David James Elliott | Cast | Actor | Self - Guest | 1 |
 Davy Jones | Cast | Actor | Self - Guest | 1 |
 Dax Shepard | Cast | Actor | Self - Guest | 1 |
 Debra Messing | Cast | Actress | Self - Guest | 2 |
 Donald Faison | Cast | Actor | Self - Guest | 1 |
 Duane Martin | Cast | Actor | Self - Guest | 1 |
 Eddie Cibrian | Cast | Actor | Self - Guest | 1 |
 Elizabeth Perkins | Cast | Actress | Self - Guest | 1 |
 Emily Procter | Cast | Actress | Self - Guest | 1 |
 Enrique Murciano | Cast | Actor | Self - Guest | 1 |
 Eric Stromer | Cast | Self - Guest | 2 | |
 Eric Mabius | Cast | Actor | Self - Guest | 1 |
 Eva Mendes | Cast | Actress | Self - Guest | 1 |
 Felicity Huffman | Cast | Actress | Self - Guest | 1 |
 George Lopez | Cast | Actor | Self - Guest | 2 |
 Goran Višnjić | Cast | Actor | Self - Guest | 1 |
 Howie Mandel | Cast | Actor | Self - Guest | 1 |
 Isaiah Washington | Cast | Actor | Self - Guest | 1 |
 James Denton | Cast | Actor | Self - Guest | 1 |
 James Lesure | Cast | Actor | Self - Guest | 1 |
 Jamie Kennedy | Cast | Actor | Self - Guest | 2 |
 Jamie Lee Curtis | Cast | Actress | Self - Guest | 1 |
 Jane Kaczmarek | Cast | Actress | Self - Guest | 1 |
 Jane Seymour | Cast | Actress | Self - Guest | 1 |
 Janice Dickinson | Cast | Actress | Self - Guest | 1 |
 Jason Segel | Cast | Actor | Self - Guest | 1 |
 Jeffrey Tambor | Cast | Actor | Self - Guest | 1 |
 Jennie Garth | Cast | Actress | Self - Guest | 1 |
Jennifer Egan | Cast | Self - Guest | 1 | |
 Jennifer Finnigan | Cast | Actress | Self - Guest | 1 |
 Jennifer Love Hewitt | Cast | Actress | Self - Guest | 1 |
 Jenny McCarthy-Wahlberg | Cast | Actress | Self - Guest | 1 |
 Jensen Ackles | Cast | Actor | Self - Guest | 1 |
 Jerry Springer | Cast | Actor | Self - Guest | 1 |
 Jesse Bradford | Cast | Actor | Self - Guest | 1 |
 Jesse McCartney | Cast | Actor | Self - Guest | 1 |
 John Oates | Cast | Actor | Self - Musical Guest | 2 |
 John Stamos | Cast | Actor | Self - Guest | 1 |
 Jonny Lee Miller | Cast | Actor | Self - Guest | 1 |
 Josh Duhamel | Cast | Actor | Self - Guest | 2 |
 José Feliciano | Cast | Actor | Self - Musical Guest | 1 |
 Julia Louis-Dreyfus | Cast | Actress | Self - Guest | 2 |
 Julianne Nicholson | Cast | Actress | Self - Guest | 1 |
 Ken Davitian | Cast | Actor | Self - Guest | 1 |
 Kevin Nealon | Cast | Actor | Self - Guest | 1 |
 Kim Raver | Cast | Actress | Self - Guest | 1 |
 Kristin Chenoweth | Cast | Actress | Self - Guest | 2 |
 Laura Linney | Cast | Actress | Self - Guest | 2 |
 Lauren Holly | Cast | Actress | Self - Guest | 1 |
 Linda Cardellini | Cast | Actress | Self | 1 |
 Lisa Edelstein | Cast | Actress | Self - Guest | 1 |
 Lisa Kudrow | Cast | Actress | Self - Guest | 2 |
 Marcia Cross | Cast | Actress | Self - Guest | 1 |
 Mario López | Cast | Actor | Self - Guest | 1 |
 Mark Harmon | Cast | Actor | Self - Guest | 1 |
 Marla Sokoloff | Cast | Actress | Self - Guest | 1 |
 Marlon Wayans | Cast | Actor | Self - Guest | 1 |
 Matthew Broderick | Cast | Actor | Self - Guest | 1 |
 Meat Loaf | Cast | Actor | Self - Musical Guest | 1 |
 Megan Mullally | Cast | Actress | Self - Host | 76 |
 Melissa Peterman | Cast | Actress | Self - Guest | 1 |
 Melora Hardin | Cast | Actress | Self - Guest | 1 |
 Merv Griffin | Cast | Actor | Self - Guest | 1 |
 Michael Clarke Duncan | Cast | Actor | Self - Guest | 1 |
 Michael Ealy | Cast | Actor | Self - Guest | 1 |
 Milo Ventimiglia | Cast | Actor | Self - Guest | 1 |
Mitch Albom | Cast | Self - Guest | 1 | |
 Molly Ringwald | Cast | Actress | Self - Guest | 1 |
 Molly Sims | Cast | Actress | Self - Guest | 1 |
 Natalie Cole | Cast | Actress | Self - Guest | 1 |
 Neil Patrick Harris | Cast | Actor | Self - Guest | 2 |
 Nick Carter | Cast | Actor | Self - Guest | 1 |
 Oded Fehr | Cast | Actor | Self - Guest | 1 |
 Omar Epps | Cast | Actor | Self - Guest | 1 |
 Parminder Nagra | Cast | Actress | Self - Guest | 1 |
 Patricia Arquette | Cast | Actress | Self - Guest | 1 |
 Patricia Heaton | Cast | Actress | Self - Guest | 2 |
 Patrick Wilson | Cast | Actor | Self - Guest | 1 |
 Paul Rodríguez | Cast | Actor | Self - Guest | 1 |
 Paz Vega | Cast | Actress | Self - Guest | 1 |
 Peter Gallagher | Cast | Actor | Self - Guest | 1 |
 Phyllis Diller | Cast | Actress | Self - Guest | 1 |
 Rainn Wilson | Cast | Actor | Self - Guest | 1 |
 Reba McEntire | Cast | Actress | Self - Guest | 1 |
 Rhea Perlman | Cast | Actress | Self - Guest | 1 |
 Ricardo Chavira | Cast | Actor | Self - Guest | 1 |
 Richard Simmons | Cast | Actor | Self - Guest | 1 |
 Rob Morrow | Cast | Actor | Self - Guest | 2 |
 Rosanna Arquette | Cast | Actress | Self - Guest | 1 |
 Rusty Schwimmer | Cast | Actress | Self - Guest | 2 |
 Scott Foley | Cast | Actor | Self - Guest | 1 |
 Sean Hayes | Cast | Actor | Self - Guest | 1 |
 Sela Ward | Cast | Actress | Self - Guest | 1 |
 Selma Blair | Cast | Actress | Self - Guest | 1 |
 Sharon Stone | Cast | Actress | Self - Guest | 1 |
 Shawn Wayans | Cast | Actor | Self - Guest | 1 |
 Shelley Morrison | Cast | Actress | Self - Guest | 1 |
 Steven Weber | Cast | Actor | Self - Guest | 1 |
 Tichina Arnold | Cast | Actress | Self - Guest | 1 |
 Tim Bagley | Cast | Actor | Self - Guest | 2 |
 Tim Daly | Cast | Actor | Self - Guest | 2 |
 Tisha Campbell | Cast | Actress | Self - Guest | 1 |
 Tom Arnold | Cast | Actor | Self - Guest | 1 |
 Tom Bergeron | Cast | Actor | Self - Guest | 3 |
 Tom Green | Cast | Actor | Self - Guest | 1 |
 Tracy Morgan | Cast | Actor | Self - Guest | 1 |
 Tyrese Gibson | Cast | Actor | Self - Guest | 1 |
 Virginia Madsen | Cast | Actress | Self - Guest | 1 |
 Wanda Sykes | Cast | Actress | Self - Guest | 1 |
 Wayne Brady | Cast | Actor | Self - Guest | 1 |
 Wendie Malick | Cast | Actress | Self - Guest | 1 |
 Will Ferrell | Cast | Actor | Self - Guest | 2 |
 AJ Michalka | Cast | Actress | Self - Guest | 1 |
 Aly Michalka | Cast | Actress | Self - Guest | 1 |
 Angela Kinsey | Cast | Actress | Self - Guest | 1 |
Bianca Ryan | Cast | Actress | Self - Guest | 1 |
 Brian Baumgartner | Cast | Actor | Self - Guest | 1 |
 Carson Kressley | Cast | Actor | Self - Guest | 1 |
 Cesar Millan | Cast | Actor | Self - Guest | 1 |
Cheyenne Kimball | Cast | Self - Guest | 1 | |
 Clay Aiken | Cast | Actor | Self - Musical Guest | 2 |
 Clinton Kelly | Cast | Self - Guest | 1 | |
 Cobie Smulders | Cast | Actress | Self - Guest | 1 |
 Criss Angel | Cast | Actor | Self - Guest | 1 |
 Dave Annable | Cast | Actor | Self - Guest | 1 |
 JoJo | Cast | Actress | Self - Guest | 1 |
 Josh Radnor | Cast | Actor | Self - Guest | 1 |
Kevin Federline | Cast | Actor | Self - Guest | 1 |
 Kimberley Locke | Cast | Actress | Self - Musical Guest | 2 |
Mark Leyner | Cast | Actor | Self - Guest | 1 |
 Mark Montano | Cast | Self - Guest | 1 | |
 Masi Oka | Cast | Actor | Self - Guest | 1 |
 Nadine Velazquez | Cast | Actress | Self - Guest | 1 |
 Noah Gray-Cabey | Cast | Actor | Self - Guest | 1 |
Ryan Sutter | Cast | Self - Guest | 1 | |
 Sue Johanson | Cast | Actress | Self - Guest | 1 |
 Tim Gunn | Cast | Actor | Self - Guest | 1 |
Trista Sutter | Cast | Actress | Self - Guest | 1 |
 Tyler James Williams | Cast | Actor | Self - Guest | 1 |
 Jeffrey Sebelia | Cast | Actor | Self - Guest | 1 |
Taylor Hicks | Cast | Self - Musical Guest | 2 | |
 Taylor Swift | Cast | Actress | Self - Musical Guest | 1 |
Taylor Ware | Cast | Self - Guest | 1 | |
 Lisa Williams | Cast | Actress | Self - Guest | 1 |
 Sarah Rush | Cast | Actress | Self - Guest | 1 |
 Brian McKnight | Cast | Actor | Self - Musical Guest | 1 |
Joshua Bell | Cast | Actor | Self - Musical Guest | 1 |
 Benji Schwimmer | Cast | Actor | Self - Guest | 2 |
 Fantasia Barrino | Cast | Actress | Self - Musical Guest | 1 |
 Ruben Studdard | Cast | Actor | Self - Musical Guest | 1 |
 Cris Judd | Cast | Actor | Self - Guest | 1 |
Rupert Boneham | Cast | Actor | Self - Guest | 1 |
 Jarod Miller | Cast | Actor | Self - Guest | 1 |
Joshua Radin | Cast | Actor | Self - Musical Guest | 1 |
 Nathan Burton | Cast | Actor | Self - Guest | 2 |
 Phil Pfister | Cast | Actor | Self - Guest | 2 |
| Person | Type | Job | Role(s) | Episodes |
