
| Jordana Spiro | ... | P.J. Franklin / ... (39 episodes, 2006-2009) |
 | Kyle Howard | ... | Bobby Newman / ... (39 episodes, 2006-2009) |

| Reid Scott | ... | Brendan Dorff / ... (39 episodes, 2006-2009) |
 | Michael Bunin | ... | Kenny Morittori / ... (38 episodes, 2006-2009) |
 | Jim Gaffigan | ... | Andy Franklin (36 episodes, 2006-2009) |

| Jamie Kaler | ... | Mike Callahan / ... (35 episodes, 2006-2009) |

| Kellee Stewart | ... | Stephanie / ... (33 episodes, 2006-2009) |
 | Mini Anden | ... | Elsa (7 episodes, 2008-2009) |

| Billy Burke | ... | Jack / ... (4 episodes, 2008) |

| Pat Finn | ... | Charlie (4 episodes, 2006-2007) |
 | Jeannie Noth | ... | Meredith / ... (4 episodes, 2006-2008) |

| Eddie McClintock | ... | Hank (4 episodes, 2006) |

| Johnny Galecki | ... | Trouty (3 episodes, 2006-2007) |

| Zoe Perry | ... | Waitress (3 episodes, 2006-2008) |

| Lindsey Stoddart | ... | Wendy (3 episodes, 2006-2008) |

| Nia Vardalos | ... | Jo (3 episodes, 2008) |

| Nicole Sullivan | ... | Kimmie (2 episodes, 2007-2009) |

| Christopher McDonald | ... | George Newman (2 episodes, 2008) |

| Mimi Rogers | ... | Maggie / ... (2 episodes, 2008) |

| David Pressman | ... | Mexican Freddy (2 episodes, 2006-2008) |

| Michael Landes | ... | Evan (2 episodes, 2007) |
 | Travis Schuldt | ... | Matt Dougan (2 episodes, 2007) |

| Jeremy Sisto | ... | Thorn (2 episodes, 2007) |

| Bre Blair | ... | Debbie (2 episodes, 2007-2008) |
 | Jay Tarses | ... | Jack Briscoe (2 episodes, 2007-2008) |
 | Adrian Wenner | ... | John (2 episodes, 2007-2008) |

| Daniel Espeseth | ... | Max (2 episodes, 2006) |

| Haleigh Ward | ... | Carly (2 episodes, 2007-2008) |

| Schuyler Yancey | ... | Lance / ... (2 episodes, 2007-2008) |

| Chris Spinelli | ... | Improv Patron / ... (2 episodes, 2008) |
 | Jean Villepique | ... | Beth (2 episodes, 2008) |

| Krystal Call | ... | Club goer / ... (2 episodes, 2009) |
|

| Lilly Hartley | ... | Suzy (unknown episodes) |

| Timothy Judd | ... | Bartender (unknown episodes) |
 | Ann Kristin | ... | DeAnne (unknown episodes) |
 | Jason Packham | ... | Brian (unknown episodes) |

| Anthony Vitale | ... | Bar Patron (unknown episodes) |
|
| Jamie Tarses | .... | executive producer (15 episodes, 2006-2009) |
| Robert Visciglia Jr. | .... | co-producer (15 episodes, 2006-2008) |
| Gavin Polone | .... | executive producer (14 episodes, 2006-2008) |
| Betsy Thomas | .... | executive producer (13 episodes, 2006-2009) |
| Ken Ornstein | .... | producer / executive producer (12 episodes, 2006-2008) |
| Rick Singer | .... | producer (12 episodes, 2006) |
| Eric Gilliland | .... | consulting producer / executive producer (11 episodes, 2006-2009) |
| Courtney Lilly | .... | producer / supervising producer (10 episodes, 2008-2009) |
| Jay Kleckner | .... | producer (9 episodes, 2009) |
| Veronica Motl McElroy | .... | associate producer (9 episodes, 2009) |
| Rick Redick | .... | co-producer (9 episodes, 2009) |
| Cynthia Caponera | .... | supervising producer (6 episodes, 2006) |
| Rick Singer | .... | producer (6 episodes, 2006) |
| Sebastian Jones | .... | co-executive producer / supervising producer (6 episodes, 2007-2009) |
| Adrian Wenner | .... | consulting producer / producer (6 episodes, 2007-2009) |
| Corey Nickerson | .... | producer (6 episodes, 2008) |
| Ethan Sandler | .... | consulting producer (3 episodes, 2007-2008) |
| |
|
| Bob Costanza | .... | sound effects editor (43 episodes, 2006-2009) |
| Tim Chilton | .... | foley artist (33 episodes, 2006-2009) |
| Kevin Meltcher | .... | assistant sound editor (33 episodes, 2006-2009) |
| Brian Robinson | .... | boom operator / sound mixer (23 episodes, 2006-2009) |
| Nate Arrigoni | .... | assistant sound editor (12 episodes, 2006) |
| Larry Benjamin | .... | sound re-recording mixer (10 episodes, 2007-2009) |
| Jacob Goldstein | .... | sound mixer / production sound mixer (7 episodes, 2006-2007) |
| Eric Naughton | .... | second boom operator (7 episodes, 2007-2009) |
| Sean Byrne | .... | sound effects editor (6 episodes, 2006) |
| Robert Webber | .... | supervising sound editor (4 episodes, 2006) |
| Bartek Swiatek | .... | sound mixer: Chicago / sound mixer: Chicago exteriors (4 episodes, 2007-2009) |
| Ethan Beigel | .... | sound re-recording mixer (3 episodes, 2007-2008) |
| Tim Terusa | .... | supervising sound editor (2 episodes, 2006-2007) |
| J.T. Mueller | .... | sound utility: Chicago (2 episodes, 2007) |
| Keith Rogers | .... | sound re-recording mixer (2 episodes, 2008) |
|
| Sterling Moore | .... | second boom operator (unknown episodes) |
| |
|
| Bobby Thomas | .... | key grip (40 episodes, 2006-2009) |
| Anthony Anderson | .... | gaffer (28 episodes, 2006-2009) |
| Lance Dickinson | .... | lighting console programmer (21 episodes, 2007-2009) |
| David J. Frederick | .... | camera operator (12 episodes, 2006) |
| Maninder K. Saini | .... | digital imaging technician (12 episodes, 2006) |
| Steven G. Fracol | .... | Steadicam operator / camera operator: "b" camera (11 episodes, 2007-2008) |
| Andrew Lemon | .... | digital imaging technician (9 episodes, 2008) |
| Clinton Weathers | .... | electrician (7 episodes, 2009) |
| Frank Orozco | .... | best boy grip (5 episodes, 2006) |
| Michael Ursetta | .... | rigging electrician (2 episodes, 2007) |
|
| Andrew Degnan | .... | second assistant camera (unknown episodes) |
| Michael Frediani | .... | camera operator (unknown episodes) |
| Andrew Korner | .... | best boy electric (unknown episodes) |
| Justin M. Lubin | .... | still photographer (unknown episodes) |
| Erik Messerschmidt | .... | gaffer (unknown episodes) |
| David Mun | .... | second assistant camera (unknown episodes) |
| Ron Peterson | .... | first assistant camera (unknown episodes) |
| Steve Peterson | .... | first assistant camera (unknown episodes) |
| |
|
| Sergio C. Rodriguez | .... | assistant production coordinator / production coordinator (27 episodes, 2007-2009) |
| Kris Selvidge | .... | production coordinator (20 episodes, 2006-2009) |
| Eric Kovtun | .... | production assistant (12 episodes, 2006) |
| Elizabeth Tyson | .... | production assistant (12 episodes, 2006) |
| C. Brian Smith | .... | writing assistant (10 episodes, 2006) |
| Robin E. Agron | .... | location manager: Chicago (9 episodes, 2007-2009) |
| Erica Neilsen | .... | production assistant (9 episodes, 2007-2009) |
| Jeff Hunt | .... | production assistant (9 episodes, 2008) |
| Evan B. Jones | .... | assistant to executive producer (9 episodes, 2009) |
| Amy L. Schwartz | .... | production assistant (9 episodes, 2009) |
| Holly Lee | .... | production secretary / production assistant (6 episodes, 2006-2009) |
| Courtney Lilly | .... | executive story editor (6 episodes, 2006-2007) |
| Marc Quandt | .... | location assistant (5 episodes, 2007-2009) |
| Ellen J. Morris | .... | set production assistant (4 episodes, 2006) |
| Rob Ulin | .... | creative consultant (4 episodes, 2006) |
| Sara Ellingen | .... | production coordinator: Chicago (4 episodes, 2007-2009) |
| Jacob Gilbert | .... | production assistant (3 episodes, 2008) |
| Jennifer LaForte | .... | stand-in: Chicago / stand-in: female lead / ... (2 episodes, 2006-2007) |
| Brian Palmert | .... | production assistant (2 episodes, 2007-2008) |
| Callie Hersheway | .... | office production assistant: Chicago (2 episodes, 2007) |
| Whit Vogel | .... | production assistant (2 episodes, 2008) |
|
| Becky Dorf Crowley | .... | assistant to executive producer and writer / script coordinator (unknown episodes) |
| Paul Alan Grey | .... | production assistant (unknown episodes) |
| Teni Halburian | .... | publicist (unknown episodes) |
| Kenneth Hunter | .... | location manager (unknown episodes) |
| Josh Kuhn | .... | key craft service (unknown episodes) |
| Valerie Lindow | .... | production assistant (unknown episodes) |
| Maureen Tenenbaum | .... | script supervisor (unknown episodes) |
| |