- Traylor Howard
- Â Sharon Carter 81 episodes, 1998-2001
- Ryan Reynolds
- Â Michael 'Berg' Bergen 81 episodes, 1998-2001
- Richard Ruccolo
- Â Pete Dunville 81 episodes, 1998-2001
- Suzanne Cryer
- Â Ashley Walker 60 episodes, 1998-2001
- Nathan Fillion
- Â Johnny Donnelly 60 episodes, 1998-2001
- Jillian Bach
- Â Irene 31 episodes, 1999-2001
- Jennifer Westfeldt
- Â Melissa 13 episodes, 1998
- Julius Carry
- Â Bill 13 episodes, 1998
- David Ogden Stiers
- Â Mr. Bauer 13 episodes, 1998
- Giuseppe Andrews
- Â Germ 13 episodes, 1999-2001
- Victor Raider-Wexler
- Â Fire Chief Felix Shaw 9 episodes, 2000-2001
- Tiffani Thiessen
- Â Marti 8 episodes, 2000
- Maury Ginsberg
- Â Kamen 4 episodes, 1998-1999
- Dian Bachar
- Â Roger 4 episodes, 2000-2001
- Chris Butler
- Â Fireman / ... 4 episodes, 2000-2001
- Jack Impellizzeri
- Â Chuck 4 episodes, 2000-2001
- Marguerite MacIntyre
- Â Kaitlin Rush 3 episodes, 1998-1999
- Michael Welch
- Â Michael Rush 3 episodes, 1998-1999
- Bobbie Phillips
- Â Shawn 3 episodes, 1998-2000
- Bo Derek
- Â Susan Bergen 3 episodes, 2001
- Steven Gilborn
- Â Mark Breslin 3 episodes, 2001
- Lacey Kohl
- Â Katie Connor 3 episodes, 2001
- Brian Dunkleman
- Â Customer / ... 3 episodes, 1998-1999
- Rachel Jacobson
- Â Girl owning magazine / ... 3 episodes, 1998-1999
- Amy Van Horne
- Â Bethany 1 episode, 1998
- Kenneth Kimmins
- Â Mr. Walker 2 episodes, 1998
- Constance Marie
- Â Venita 2 episodes, 1999
- Nancy Lenehan
- Â Dr. Peel 2 episodes, 1999-2000
- Dick Martin
- Â Charlie / ... 2 episodes, 1998-1999
- Tamara Bick
- Â Customer / ... 2 episodes, 1998
- Cheryl Ladd
- Â Berg's Mom 2 episodes, 1999-2000
- Robert Goulet
- Â Robert Goulet 2 episodes, 1999-2000
- Keith Neubert
- Â Keith, Isabella's Boyfriend / ... 2 episodes, 1998-1999
- Darnell Suttles
- Â Sgt. Sullivan 2 episodes, 1999
- Nomar Garciaparra
- Â Nomar Garciaparra 2 episodes, 2000
- Greta Cavazzoni
- Â Colette 2 episodes, 1999
- Darlene Kardon
- Â Mrs. Himmelfarb 2 episodes, 1998
- Ron Pearson
- Â Carpenter / ... 2 episodes, 2000-2001
- Van Epperson
- Â Man with broken arm / ... 2 episodes, 1999-2000
- Dean Weichel
- Â Lou / ... 2 episodes, 1999-2000
- Robin Krieger
- Â Dr. Harvey's date / ... 2 episodes, 1998-2000
- Fred Willard
- Â Frank Farber 1 episode, 1998
- Kathy Kinney
- Â Mimi Bobeck 1 episode, 1998
- Bill Macy
- Â Mr. Harrison 1 episode, 1998
- Joel Higgins
- Â Sharon's Father 1 episode, 1999
- Sydney Bennett
- Â Nicole 1 episode, 1998
- J. Antonio Moon
- Â Phil, Reporter 1 episode, 1998
- Beth Grant
- Â Tufts College Employee 1 episode, 1999
- Jon Cryer
- Â Justin 1 episode, 1998
- Jane Carr
- Â Lucy 1 episode, 1998
- Adam Carolla
- Â Adam Carolla 1 episode, 1998
- Mike Batayeh
- Â Ticket Scalper #2 1 episode, 1998
- Brigitta Dau
- Â Britney Walker 1 episode, 1998
- Gina Mari
- Â Terri 1 episode, 1998
- Scott Allman
- Â Bobby 1 episode, 1998
- Jeridan Frye
- Â Cathy 1 episode, 1998
- Maite Arnedo
- Â Pen Borrowing Student 1 episode, 1998
- Stephen Tobolowsky
- Â Father Viteri 1 episode, 1999
- Anthony Head
- Â Dr. Staretski 1 episode, 1999
- Robert Joy
- Â Ed 1 episode, 1999
- James Patrick Stuart
- Â Priest 1 episode, 1999
- Louis Ferreira
- Â Brandon 1 episode, 1999
- Sam Lloyd
- Â Career Counsellor 1 episode, 1999
- Suzanne Krull
- Â Bates Balou 1 episode, 1999
- Travis Barker
- Â Self 1 episode, 1999
- Rolando Molina
- Â Larry the cameraman 1 episode, 1999
- Ray 'Boom Boom' Mancini
- Â Ray 'Boom Boom' Mancini 1 episode, 1999
- Heath Hyche
- Â Gilbert 1 episode, 1999
- James Avery
- Â Judge 1 episode, 2000
- Dan Finnerty
- Â Dan Finnerty - The Dan Band 1 episode, 2000
- Mo Gaffney
- Â Dr. Brice 1 episode, 2000
- Alla Korot
- Â Julie Sutton 1 episode, 2000
- Joie Shettler
- Â Lady in Red 1 episode, 2000
- Rena Sofer
- Â Lauren Henderson 1 episode, 1998
- Carmen Electra
- Â Isabella 1 episode, 1998
- Sean O'Bryan
- Â Ted 1 episode, 1998
- Howard Hesseman
- Â Mr. Bergen 1 episode, 1998
- Harve Presnell
- Â Edgar J. Hagerty 1 episode, 1998
- Jean Speegle Howard
- Â Mrs. Wexler 1 episode, 1998
- Michelle Stafford
- Â April 1 episode, 1998
- Michael Ensign
- Â Chairman at Presentation 1 episode, 1998
- Julene Renee
- Â Molly 1 episode, 1998
- Matt Landers
- Â Tommy P. O'Neal 1 episode, 1998
- Amelinda Smith
- Â Cathy's Friend 1 episode, 1998
- Ryan Drummond
- Â Issac Glickstein 1 episode, 1998
- Steven Barr
- Â Man in the park 1 episode, 1998
- Bette Ford
- Â Marge Ryecart 1 episode, 1998
- Joe Michael Burke
- Â Tim 1 episode, 1998
- Brian Blondell
- Â Ticket Scalper #1 1 episode, 1998
- Gregg Almquist
- Â Katey's Father 1 episode, 1998
- Eric Whitmore
- Â Bathroom Doorman 1 episode, 1998
- Ed Levey
- Â Customer 1 episode, 1998
- Conchata Ferrell
- Â Shawn's Mother 1 episode, 1999
- Trevor Einhorn
- Â Robbie 1 episode, 1999
- Terry Kiser
- Â Chet 1 episode, 1999
- Amy Hill
- Â Pete's boss 1 episode, 1999
- Tracey Ellis
- Â Mary 1 episode, 1999
- Steve Landesberg
- Â Berg's Dad 1 episode, 1999
- Pat Crawford Brown
- Â Librarian 1 episode, 1999
- Tom DeLonge
- Â Self 1 episode, 1999
- David Gianopoulos
- Â Buster Garret 1 episode, 1999
- Marcelo Tubert
- Â Anchorman Juan De La Rosa 1 episode, 1999
- Lee Everett
- Â Gail 1 episode, 1999
- J. Keith van Straaten
- Â Ticket taker 1 episode, 1999
- Steve Mittleman
- Â Dr. Gordon 1 episode, 1999
- James Denton
- Â Dr. Howard Zwaneveld 1 episode, 2000
- Lee Arenberg
- Â Irene's Dad / ... 1 episode, 2000
- Christopher Darga
- Â Barton 1 episode, 2000
- Lorna Scott
- Â Ironing Woman 1 episode, 2000
- Rob Moore
- Â Rob Moore - The Dan Band 1 episode, 2000
- Michael Milhoan
- Â Police Officer 1 episode, 2000
- Jennifer Courtney
- Â Angry Wedding Dress Shopper 1 episode, 2000
- Nancy Cassaro
- Â Lamaze Teacher 1 episode, 2000
- Michael Ray Clark
- Â Bartender 1 episode, 2000
- Kevin Weisman
- Â Lost & Found Employee at Yellow Cab 1 episode, 2001
- Charles Robinson
- Â Officer Harris 1 episode, 2001
- Pat Bullard
- Â Actor in Movie 1 episode, 2001
- Ken Lerner
- Â Cop 1 episode, 1998
- Mercy Malick
- Â Circus Girl 1 episode, 1998
- John Ennis
- Â Ashley's Neighbour 1 episode, 1998
- Beverly Leech
- Â Claudia 1 episode, 1998
- Lou Cutell
- Â Tailor 1 episode, 1998
- Timothy Dowling
- Â Barney 1 episode, 1998
- Shana Mangatal
- Â Maitre d' 1 episode, 1998
- Jack Brewer
- Â Guy interested in Sharon 1 episode, 1998
- Tom Bailey
- Â Angry Fan 1 episode, 1998
- Josh Gilbert
- Â Customer 1 episode, 1998
- Cheryl Boudreau
- Â Woman Who's Lost 1 episode, 1998
- Bridget Spurgeon
- Â Bunny 1 episode, 1998
- Lute Hectorr
- Â Student #2 1 episode, 1998
- Nick Toth
- Â Little Boy 1 episode, 1998
- John Ducey
- Â Don Lewis 1 episode, 1999
- George Coe
- Â Mr. Belt, Sharon's boss 1 episode, 1999
- Tina Arning
- Â Nurse 'Never-Say-No' 1 episode, 1999
- Peter Siragusa
- Â Buster's trainer 1 episode, 1999
- Mark Hoppus
- Â Self 1 episode, 1999
- Meredith Zinner
- Â Meghan 1 episode, 1999
- Patty Ross
- Â Johnny's Sister Patti 1 episode, 1999
- David Franco
- Â Vendor on Eiffel Tower 1 episode, 1999
- Mark S. Porro
- Â Tom Rush 1 episode, 1999
- Lee Faranda
- Â Waiter 1 episode, 1999
- Jill Zimmerman
- Â Theatre Patron 1 episode, 1999
- Dave Lafa
- Â Delivery guy 1 episode, 1999
- Kathleen McClellan
- Â Tina, the body double 1 episode, 2000
- Mia Cottet
- Â Tara Roberts 1 episode, 2000
- Keith Diamond
- Â Bouncer 1 episode, 2000
- Ron Fassler
- Â Doctor 1 episode, 2000
- Darryl Armbruster
- Â Darryl Armbruster - The Dan Band 1 episode, 2000
- Al Michaels
- Â Al Michaels 1 episode, 2000
- Michele Kelly
- Â Sharon's Wedding Dress Rival 1 episode, 2000
- Ross Gottstein
- Â Businessman 1 episode, 2000
- Alanna Ubach
- Â 'Chivalry' Nurse 1 episode, 2001
- Pamela Gordon
- Â Law Office Receiptionist 1 episode, 2001
- Ellis Williams
- Â Fire Inspector 1 episode, 2001
- Robert Munns
- Â Doctor Richards 1 episode, 2001
- Bill Burr
- Â Fitzey 1 episode, 1998
- Rockmond Dunbar
- Â Johnny's friend Tommy 1 episode, 1998
- Molly Morgan
- Â Punk Girl 1 episode, 1998
- Marie Marshall
- Â Valerie 1 episode, 1998
- Lyle Kanouse
- Â Tessio 1 episode, 1998
- Warren Munson
- Â Dave Ryecart 1 episode, 1998
- Eliott Goretsky
- Â Yuri Kirov 1 episode, 1998
- Paul Kim Jr.
- Â Student #1 1 episode, 1998
- Michael Girardin
- Â Angry Fan 1 episode, 1998
- Angelo Vacco
- Â Sketch Model's Friend 1 episode, 1998
- Cheray O'Neal
- Â Accuser at Gym 1 episode, 1998
- Scott Adsit
- Â Kevin 1 episode, 1999
- Nia Vardalos
- Â Evelyn 1 episode, 1999
- Mina Kolb
- Â Flower Seller 1 episode, 1999
- Mary K. DeVault
- Â Pizza Place Customer 1 episode, 1999
- Brandon Michael DePaul
- Â Johnny's Nephew Andy 1 episode, 1999
- Jorge Luis Abreu
- Â Delivery Man 1 episode, 1999
- Noel Conlon
- Â Ring doctor 1 episode, 1999
- Nick Meaney
- Â Frenchman 1 episode, 1999
- Adam Caine
- Â Dr. Vamessey 1 episode, 1999
- Chuck Martinez
- Â News director 1 episode, 1999
- Rachael Harris
- Â Pregnant Damsel 1 episode, 2000
- Sam Anderson
- Â Dr. Harvey 1 episode, 2000
- Ali Landry Monteverde
- Â Girl at Laundromat 1 episode, 2000
- Brande Roderick
- Â Blonde on Commuter Train 1 episode, 2000
- Mike Weinberg
- Â Young Boy in Firehouse 1 episode, 2000
- Jack Salvatore Jr.
- Â Brat 1 episode, 2000
- Lillian Adams
- Â Mrs. Elliott 1 episode, 2000
- Charles Emmett
- Â Instructor 1 episode, 2000
- Roger Ontiveros
- Â Construction Worker 1 episode, 2000
- Robin Riker
- Â Mrs. Brewer 1 episode, 2001
- Jay Johnston
- Â Cab Driver 1 episode, 2001
- Reynaldo Gallegos
- Â Fireman 1 episode, 2001
- Kelleia Sheerin
- Â Actress in Movie 1 episode, 2001
- Keith Langsdale
- Â Stanley 1 episode, 2001
- Jason Clarke
- Â Hank 1 episode, 1998
- Suzy Nakamura
- Â Jessica 1 episode, 1998
- Andrea C. Robinson
- Â Tina the Waitress 1 episode, 1998
- Sam Rubin
- Â Newscaster 1 episode, 1998
- Michael Adler
- Â Police Officer 1 episode, 1998
- Alecia Guzman
- Â Madeline 1 episode, 1998
- Amy Loubalu
- Â Failing Student 1 episode, 1998
- David Beach
- Â Therapist 1 episode, 1999
- T.R. Richards
- Â Referee 1 episode, 1999
- Sid Newman
- Â Old Man 1 episode, 2000
- Annie Abbott
- Â Mrs. Cartwright, charity board head 1 episode, 2000
- James Leo Ryan
- Â 'Desperate' Man 1 episode, 2000
- Dona Hardy
- Â Woman bidding for Pete 1 episode, 2000
- Harley Zumbrum
- Â Bartender 1 episode, 2000
- Aliza Murrieta
- Â Nun 1 episode, 2000
- Nick Gaza
- Â Hospital Cleaner 1 episode, 2000
- Cynthia Sanders
- Â Prisoner 1 episode, 2000
- Ron Harper
- Â Lawyer 1 episode, 2001
- Rob Evors
- Â Ticket Taker 1 episode, 2001
- Mike Rad
- Â Autograph Hunter 1 episode, 2001
- Carol Swarbrick
- Â Valerie Richards 1 episode, 2001
- Gregory Storm
- Â Room Service Worker 1 episode, 2001
- Matt Williamson
- Â Fireman 1 episode, 2001
- James Everett Grace
- Â Fireman 1 episode, 2001
- Dana Patrick
- Â Leann 1 episode, 1998
- Douglas Weston
- Â Justin Thompson 1 episode, 1998
- Zaid Farid
- Â Security Guard 1 episode, 1998
- Emily Newman
- Â Susan 1 episode, 1998
- Catherine Roberts
- Â Girl Serving Jello Shots 1 episode, 1998
- Elisabeth Harnois
- Â Translator 1 episode, 1999
- Ann Walker
- Â Mrs. Olsen 1 episode, 1999
- Beth Cahill
- Â Kim 1 episode, 1999
- Jimm Giannini
- Â Beer guy 1 episode, 1999
- Donna M. Perkins
- Â World Glow chairwoman 1 episode, 1999
- Bridget McMeel
- Â Johnny's Sister Joanie 1 episode, 1999
- Charles C. Stevenson Jr.
- Â Mr. Lockwood 1 episode, 2000
- Julius Charles Ritter
- Â Boy with Watergun 1 episode, 2000
- Lawrence LeJohn
- Â Laundromat Manager 1 episode, 2000
- Robert Louis Kempf
- Â Large Man 1 episode, 2000
- Warren Sweeney
- Â Scam Artist 1 episode, 2001
- Neil Conrad
- Â Fireman 1 episode, 2001
- Kimberly Rowe
- Â Phone Number Student 1 episode, 1998
- Michael Faulkner
- Â Band Guy 1 episode, 1998
- Barenaked Ladies
- Â Themselves 1 episode, 1999
- Mildred Dumas
- Â Charity board member 1 episode, 2000
- James Sterret Bryant
- Â Man in Wheelchair 1 episode, 2000
- Kat Cressida
- Â News Reader 1 episode, 2001
- Peter A. Hulne
- Â 'Smellie' 1 episode, 1998
- Ogie Zulueta
- Â Guy with Ghettoblaster 1 episode, 2000
- Maggie Rowe
- Â Mother in Store 1 episode, 2001
- Thomas Vincent Kelly
- Â Customer Wanting Coffee 1 episode, 1998
- Paul Keith
- Â Charity board member 1 episode, 2000
- Robin Nance
- Â Sharon's friend Heather 1 episode, 1998
- John Maraffi
- Â Jack 1 episode, 1998
- Seth Walther
- Â Nurse Jenkins 1 episode, 2000
- Bonnie Somerville
- Â Cindy 1 episode, 1998
- Christie Lynn Smith
- Â Annette Shaw 1 episode, 2000
- Peter Spellos
- Â Mikos 1 episode, 1998
- Lauren Wylie
- Â Sharon's friend Deb 1 episode, 1998
- Sarah Thompson
- Â Young Lady at the End of the Bar (uncredited) 1 episode, 1998
- David Hartle
- (uncredited) 1 episode, 1998
- Dale Hawes
- Â Band Guy #2 (uncredited) 1 episode, 1998
- Mark Ankeny
- Â Announcer (uncredited) 1 episode, 1998
- Jennifer Robertson
- Â Waitress (uncredited) 1 episode, 1998
- Alycia Lee
- Â Annie (uncredited) 1 episode, 1998
- Heath Castor
- Â The Guy In The Hat (uncredited) 1 episode, 1998
- Michael Eskridge
- Â Party Guest (uncredited) 1 episode, 1998
- Beth Aylward
- Â Johnny's Sister Wendy (uncredited) 1 episode, 1999
- Lainie Strouse
- Â Tammy (uncredited) 1 episode, 1999
- Craig Joseph Stevens
- Â Gary (uncredited) 1 episode, 1999
- Jim Turner
- Â Bank Officer (uncredited) 1 episode, 2000
- Mark Fite
- Â Nomar (uncredited) 1 episode, 2000
- David Hutchison
- Â Jimmy (uncredited) 1 episode, 2000
- Christopher Francis
- Â Reporter (uncredited) 1 episode, 2000
- April Mills
- Â Girl at Land (uncredited) 1 episode, 2000
