All 297 actors in both ER and Malcolm in the Middle
297 actors have appeared in both ER and Malcolm in the Middle, across 482 episodes. The most-credited is Lyn Alicia Henderson, Paramedic Pamela Olbes in ER and Audience Member #1 in Malcolm in the Middle.
| Actor | In ER | In Malcolm in the Middle | Eps | Eps |
|---|---|---|---|---|
| Lyn Alicia Henderson | Paramedic Pamela Olbes | Audience Member #1 | 149 | 1 |
| Craig Lamar Traylor | Michael | Stevie Kenarban | 1 | 57 |
| Emy Coligado | Student #6 | Piama | 1 | 28 |
| Eric Nenninger | Psychotic Biting Patient | Eric Hansen | 1 | 27 |
| Sam Anderson | Dr. Jack Kayson | Police Commissioner | 19 | 1 |
| Busy Philipps | Dr. Hope Bobeck | Meghan | 14 | 1 |
| Kyle Sullivan | Nicholas Rosato | Dabney Hooper | 1 | 24 |
| Hallee Hirsh | Rachel Greene | Jessica | 14 | 1 |
| Drew Powell | Dennis Voltaire | Cadet Drew | 1 | 11 |
| Arjay Smith | Brian | Finley | 1 | 9 |
| Steve Vinovich | Wayne Lentloff | Mr. Hodges, Principal | 2 | 3 |
| Dan Martin | Lieutenant | Malik | 1 | 7 |
| Rheagan Wallace | Layla Dering | Raduca, Jackie | 1 | 3 |
| Perry Anzilotti | Dr. Perry (Anesthesiologist), Ed | Earl | 22 | 1 |
| Bob Glouberman | Jeff | Gerry | 1 | 2 |
| Danny McCarthy | Firefighter James | Hanson | 1 | 5 |
| Jack McGee | Rodney McMullen | Coach | 1 | 2 |
| Edward James Gage | Orderly | Brian | 1 | 7 |
| Julie Hagerty | Brenda Wilkerson | Polly | 1 | 4 |
| Merrin Dungey | Daphina | Kitty Kenarban, Teacher | 1 | 6 |
| Kathryn Joosten | Lois | Claire | 1 | 1 |
| Eric Payne | Billy Wilder, Cop, Officer Beechum | Phil | 8 | 3 |
| Tara Karsian | Liz Dade | Shelly | 7 | 1 |
| Alessandra Torresani | Kate Preston | Kirsten, Sara Coleman | 1 | 2 |
| Amy Farrington | Sandy Mader | Karen | 1 | 2 |
| Carla Jimenez | Eloise | Attendant | 2 | 1 |
| Gloria LeRoy | Beth Lang | Judith, Martha | 1 | 2 |
| Kevin Brief | Walter Brosnich | Brian, Guy | 1 | 2 |
| Patricia Place | Mrs. Romero | Dolores, Mrs. Jansen | 1 | 2 |
| Susan Sarandon | Nora | Meg | 1 | 2 |
| Cody Estes | Rudy | Young Malcolm, Malcolm at 4 | 1 | 3 |
| Kevin Michael Richardson | Patrick | Bob Hope | 3 | 1 |
| Wells Rosales | Cory | Private Martinez | 1 | 3 |
| Deborah May | Nursing Director Mary Cain | Betty | 7 | 1 |
| Amy Bruckner | Ariel | Zoe | 1 | 3 |
| Christie Lynn Smith | Marina Grasso | Angela | 1 | 2 |
| Fredric Lehne | Bum's Friend | Officer Ridley | 1 | 1 |
| Geoff Meed | Bart, Gary Parnell | Delivery Guy | 2 | 1 |
| Jamie Renee Smith | Emily Perrault | Paula | 1 | 1 |
| Jeff Doucette | Larkowski | Nate | 1 | 1 |
| Kate Miner | Marcia | Katie | 1 | 1 |
| Lilyan Chauvin | Nurse Edna | Marcia | 1 | 1 |
| McNally Sagal | Madeline | Woman | 1 | 1 |
| Michael Gaston | U.S. Marshal Rick Cromley | Mel | 1 | 1 |
| Nancy Lenehan | Edie Harvell | Christie, Helen | 1 | 2 |
| Nestor Serrano | David Torres, CDC | Pig Prosecutor | 1 | 1 |
| Patricia Belcher | Ward Nurse | Dr. Lucille Armstrong | 1 | 1 |
| Phil Abrams | Rodney | Neighbor | 1 | 1 |
| Reggie Jordan | Street Sweeper | Man, Police Officer | 1 | 2 |
| Shannon Woodward | Kelly Taggart | Tammy | 2 | 1 |
| Tom Virtue | Pares | Peter Dietrich, Priest | 1 | 2 |
| Jonny Acker | Jeremy | Big Senior #1, High School Kid, Ira | 1 | 3 |
| Sonya Eddy | Harriet, Student Affairs Secretary | Mabel | 3 | 1 |
| Michael Patrick McGill | Detective Ed Bernstein, Security #1, Officer Jeffries | Paramedic Dave | 6 | 1 |
| Ted Rooney | Dr. Tabash | Fritz | 6 | 1 |
| Bradley Whitford | Sean O'Brien | Meg's Husband | 2 | 1 |
| David Weisenberg | Hanukkah Harry | Finance Guy, Man | 1 | 2 |
| Michael Chieffo | Dr. Harris | Dennis | 1 | 2 |
| Ashley Gardner | Simone Phillips | Wendy | 1 | 1 |
| Bruno Amato | Sheriff | Cop | 1 | 1 |
| Cindy Lu | Chinese Woman | Clerk | 1 | 1 |
| David Bonfadini | Tim | Teenage Kid | 1 | 1 |
| James Geralden | Grieving Man | Speaker #2 | 1 | 1 |
| Lauren Hodges | Gina | Beebee | 1 | 1 |
| Lorna Raver | Dr. Anne Adelstein | Big Kathy | 1 | 1 |
| Mark Moses | Mr. Marks | Richard | 1 | 1 |
| Michael Dempsey | Mr. Beckwith | Teddy | 1 | 1 |
| Michael Kagan | Chuck Arteburn | Cop | 1 | 1 |
| Sharon Omi | Nurse Sulla | Book Club Lady #2 | 1 | 1 |
| Thomas Kopache | Dr. Stofsky | Vic Feldspar | 1 | 1 |
| Tom Simmons | Ethan Brown | Mr. Snow | 1 | 1 |
| Wayne Wilderson | Dr. Claypool | Hotel Clerk | 1 | 1 |
| Dave Power | Jeremy Cranston | Private James | 1 | 2 |
| Eddie Shin | Med Student Stanley Mao | Jordan | 2 | 1 |
| Ingo Neuhaus | Cop, McNally | Nick | 2 | 1 |
| Michael Shamus Wiles | Battalion Chief Bukata | Boyd | 1 | 2 |
| Ajgie Kirkland | Monty | Major Hughes | 1 | 1 |
| Atticus Todd | Chris Sakabu | Cowskull Guy | 1 | 1 |
| Carlie Westerman | Jessica Brower | Little Girl | 1 | 1 |
| Carolyn Seymour | Dr. Skoft | Nina | 1 | 1 |
| Clyde Kusatsu | Review Board Doctor #1 | Ice Cream Man | 1 | 1 |
| Cole Petersen | Harry Price | Tony | 1 | 1 |
| Dakota Fanning | Delia Chadsey | Emily | 1 | 1 |
| Dona Hardy | Freda, Harriet | Old Lady | 2 | 1 |
| Eddie Pepitone | Dying Patient | Homeless Nick | 1 | 1 |
| Eric Stonestreet | Willie | Phil | 1 | 1 |
| Erik von Detten | Ben Larkin | Brad | 1 | 1 |
| Frank Clem | Turner | Creepy | 1 | 1 |
| Frederick Dawson | Bus Driver | Off. Bob, Sgt. Rowdy | 1 | 2 |
| Howard George | Kuzner | Frank | 1 | 1 |
| James Martin Kelly | Mednick | Umpire | 1 | 1 |
| Jennifer Echols | Estelle | Book Club Lady #3 | 2 | 1 |
| Jerry Trainor | Darius | Guardsman | 1 | 1 |
| Joel McKinnon Miller | Mr. Emerson | Officer Karl | 1 | 1 |
| John Eric Bentley | Larry Anderson | Charlie | 1 | 1 |
| Jonathan Hernandez | Wilbur | Victor | 1 | 1 |
| Kathleen Garrett | Mrs. Meeker | Mrs. Werner | 1 | 1 |
| Marcus Folmar | Foreman | Dan | 1 | 1 |
| Marcus Toji | Binkey | Owen | 1 | 1 |
| Peter MacKenzie | Mr. Pasbalas | Terry | 1 | 1 |
| Rafael J. Noble | Smitty | Phil | 2 | 1 |
| Randy McPherson | Police Officer | Cop #2 | 1 | 1 |
| Robert Alan Beuth | ICU Chief | Tom | 1 | 1 |
| Sandra Purpuro | Mrs. Perrault | Miss Zieger | 1 | 1 |
| Vernée Watson | April Wilson | Gloria | 2 | 1 |
| Vincent Berry | Seth Willows | Dave Spath | 2 | 1 |
| Catherine Lloyd Burns | Amy | Caroline Miller | 1 | 2 |
| Cathrine Grace | Mrs. Harrison, Ratkovich | Lady | 2 | 1 |
| Fiona Hale | Dorothy Holmes | Edna Thornby, Elderly Lady | 1 | 2 |
| George Wyner | Rabbi | Foreman Fred | 2 | 1 |
| Jasmine Di Angelo | Jamila | Brittany | 2 | 1 |
| Jeanette Miller | Beverly, Flora | Elderly Woman | 2 | 1 |
| Andrew James Allen | Casey | Jerome | 1 | 1 |
| Art LaFleur | Miles Kearney | Fred | 1 | 1 |
| Ben Livingston | Mr. Gattney | Eddie | 1 | 1 |
| Bobby McGee | Kwanza Kenny | George | 1 | 1 |
| Cameron Bowen | Marten | Wayne Finster | 1 | 1 |
| Daniel Roebuck | Kyle Martin | Zoo Worker Randy | 1 | 1 |
| Dylan Kasch | Chris Spencer | Crony #1 | 1 | 1 |
| Fred Applegate | Gus's Father | Dr. Dave | 1 | 1 |
| Frederick Koehler | Benjamin Coe | Mellon | 1 | 1 |
| Garret Davis | Mr. Davis | Guy #2 | 1 | 1 |
| Jack Shearer | Hal Grunwald | Neighbor #1 | 1 | 1 |
| Jim O'Heir | McKenna | Roy | 1 | 1 |
| Joan McMurtrey | Birdwatcher | Mrs. Inkster | 1 | 1 |
| John Marshall Jones | Mr. Gaither | Cop | 1 | 1 |
| Mark Chaet | Tim | Doctor | 1 | 1 |
| Maz Jobrani | Henry Aquino | Robber #2 | 1 | 1 |
| Michelle Anne Johnson | Sarah Irving | Saleslady | 1 | 1 |
| Rebecca Metz | Waitress | Mother | 1 | 1 |
| Sam McMurray | Mike Landry | Off. Stockton | 1 | 1 |
| Scott Klace | Chris Halpern | Ned | 1 | 1 |
| Stan Sellers | James | Trade-In Guy | 1 | 1 |
| Stephen Lee | Mr. Dressler | Speaker #1 | 1 | 1 |
| Steve Kramer | Pediatric Surgeon | Doctor | 1 | 1 |
| Stewart Skelton | John Taylor | Agent | 1 | 1 |
| Tim Haldeman | Dr. Robert Wilson | Doctor | 1 | 1 |
| Andy Umberger | Dr. David Harvey | Minister | 2 | 1 |
| Carole Goldman | Bartender, Doc | Customer | 2 | 1 |
| Davenia McFadden | April Robinson, Mrs. Bevins | Dr. Samson | 2 | 1 |
| Don Perry | Dr. Stan Breedlove | Old Man | 2 | 1 |
| Evan Sabara | Jared Leary | Kid in Locker, Roger | 1 | 2 |
| Wesley Thompson | Fritz | Mr. Jones | 2 | 1 |
| Daniel Farber | Griffin | Scott | 4 | 1 |
| Alison La Placa | Female Lawyer | Barbara | 1 | 1 |
| Annie O'Donnell | Eve | Nurse | 1 | 1 |
| Austin Wolff | Timmy Wesson | Reese at 6 | 1 | 1 |
| Billy Mayo | Detective Brannigan, Sheriff | Referee | 2 | 1 |
| Bonnie Burroughs | Candy | Fake Mom | 1 | 1 |
| Dale E. Turner | Daniel Harrison | Father | 1 | 1 |
| Donna Pieroni | Wuss | Heavyset Woman | 1 | 1 |
| E.J. Callahan | Drunk | Homeless Man | 1 | 1 |
| Franc Ross | Naughton | Pawn Shop Owner | 1 | 1 |
| Gregory North | Dr. Neiser | George | 1 | 1 |
| Holmes Osborne | Dr. Sayers | Mr. Young | 1 | 1 |
| James McCauley | Dan Shore | Burt | 1 | 1 |
| Jim Jansen | Neonatologist | Mr. Jeffers, Pastor Ray | 1 | 2 |
| Joe J. Garcia | Paco | Carnie | 1 | 1 |
| Larry Hankin | Bearded Homeless Guy | Luther | 1 | 1 |
| Mark Tymchyshyn | Mr. Pruitt | Mr. Inkster | 1 | 1 |
| Maura Soden | Miranda | Roberta | 1 | 1 |
| Michael Krawic | Willow | Man | 1 | 1 |
| Michelle Davison | Helen Burke | Woman | 1 | 1 |
| Ned Schmidtke | Cal | Manfred Schmidt | 1 | 1 |
| Patrick O'Connor | CT Surgeon | Suit #1 | 1 | 1 |
| Ransford Doherty | Randall James | Orderly | 1 | 1 |
| Rishonda Napier | Chance | Little Girl #1 | 2 | 1 |
| Sherman Howard | Mr. Schoenberger | Ivan Pozefsky | 1 | 1 |
| Susan Yeagley | Woman Reporter | Nurse | 1 | 1 |
| Terence Bernie Hines | Felton | Mr. Myers | 1 | 1 |
| Wes Robinson | Grant | Richard | 1 | 1 |
| William Christian | Hayward | Don | 1 | 1 |
| Dennis Cockrum | Little League Player's Father | Lieutenant Sortino, Police Officer | 1 | 2 |
| Joan M. Blair | Anna | Beared Lady, Lunch Lady Shirley | 1 | 2 |
| Lawrence Mandley | Jackson, Maintenance Man | Security Guard | 2 | 1 |
| Shashawnee Hall | Detective Ford | Policeman | 2 | 1 |
| Blue Deckert | Watch Commander | Earl | 1 | 1 |
| Charles Emmett | Derezin | Worker | 1 | 1 |
| Donald Sage MacKay | Detective Lash | Man | 1 | 1 |
| Jayne Taini | Marge Satterfield | Farmer Woman | 1 | 1 |
| Jeanine Jackson | Elise Stevens | Claire | 1 | 1 |
| Kathleen M. Darcy | Judy | Wife | 1 | 1 |
| Mary Pat Gleason | Anne Parks | Woman | 1 | 1 |
| Michael McShane | Hugo | Dr. Phelps | 1 | 1 |
| Michael Yama | Epidemiologist | Mr. Yamamoto | 1 | 1 |
| Rick Zieff | How Ya Doin' Guy | Heidi's Dad | 1 | 1 |
| Shaun Toub | Butler | Janic | 1 | 1 |
| Wayne Lopez | Benitez | Jorge | 1 | 1 |
| Chris Freeman | Firefighter Deshazo, Oliver Miles | Squatter | 2 | 1 |
| David A. Kimball | tbd | Man, MC | 1 | 2 |
| Andre Jamal Kinney | Trevor | Teenage Son | 1 | 1 |
| Blaire Baron | Egyptologist Willa Goldman | Paula | 1 | 1 |
| Chancellor Miller | Brett | Jordan | 1 | 1 |
| Cristine Rose | Mrs. Martinez | Mrs. Demarco | 1 | 1 |
| Darlene Kardon | Elderly Woman | Gladys | 1 | 1 |
| Gino Montesinos | Officer Nunez | Ranch Hand #1 | 1 | 1 |
| Jack Impellizzeri | Bartender, Man | Deputy #2 | 2 | 1 |
| Joe Camareno | Manuel | Gordon | 1 | 1 |
| Jordan Orr | Thomas | Billy | 1 | 1 |
| Judith Moreland | Nurse Terry | Prosecutor | 1 | 1 |
| Karl T. Wright | Dr. Norris | Mark | 1 | 1 |
| Katie Morrow | Julie | Classmate #2 | 1 | 1 |
| Lamont Thompson | Paul GIlliam | Cedric Hampton | 1 | 1 |
| Linda Porter | Inga Paulson | Audrey | 1 | 1 |
| Maggie Egan | Kathleen Horne | Mrs. Abbott | 1 | 1 |
| Monti Sharp | Henry | Officer Joplin | 1 | 1 |
| Patrick Howard | Jimmy | Timmy | 1 | 1 |
| Robert Clendenin | Anesthesiologist | Garkech | 1 | 1 |
| Sarah Godshaw | JJ Mitchell | J.J. | 1 | 1 |
| Scott Haven | P.K. Palmer IV | Groom | 1 | 1 |
| Sven Holmberg | Lars | Rebirth Man | 1 | 1 |
| Angela Sargeant | Shannon | Lady | 1 | 1 |
| Bette Rae | Mrs. Gottschuck | Mrs. Potts | 1 | 1 |
| Bobby Preston | Clay Bennett | Young Hal | 1 | 1 |
| Don Pugsley | Lloyd | Scott Porter | 1 | 1 |
| Frankie Jay Allison | Frankie | Jack | 1 | 1 |
| J.T. Kubala | Robbie Beckwith | Frank | 1 | 1 |
| Larry Bagby | Second Reporter | Aide | 1 | 1 |
| Laura Henry | Lisa Halloran | Jeffrey's Mother | 1 | 1 |
| Richard Penn | Dave Donovan | Doctor | 1 | 1 |
| Sam Saletta | Adam | Boy #1 | 1 | 1 |
| Steven Gilborn | Dr. Randall | Dr. Harrison | 1 | 1 |
| Michael Kostroff | Community Theater Director | Toadie | 1 | 2 |
| Betty Carvalho | Mrs. Zevallo | Woman #2 | 1 | 1 |
| Bret Loehr | Matthew | Carl | 1 | 1 |
| Chane't Johnson | Betsy | Customer | 1 | 1 |
| Clement E. Blake | Homeless Man | Garbage Man | 1 | 1 |
| Emmett Shoemaker | Ben Fossen | Ronnie | 1 | 1 |
| J. Grant Albrecht | ICU Attending, Ronny Faneca | Tough Guy | 2 | 1 |
| Jan Devereaux | Francis | Executive #1 | 1 | 1 |
| Jay Harik | Seiger | Tim | 1 | 1 |
| Jesse D. Goins | Mr. Paige | Off. Smith | 1 | 1 |
| Katherine Boecher | Jenny | Greta | 1 | 1 |
| Larry Clarke | Male Lawyer | Don | 1 | 1 |
| Mike Rad | Delivery Man | Lab Technician | 1 | 1 |
| Mike Randleman | Cop - 1 | Ranch Hand Ray | 1 | 1 |
| Nike Doukas | Mrs. O'Connor | Maria | 1 | 1 |
| Octavia Spencer | Maria Jones | Cashier | 1 | 1 |
| Rocky McMurray | Sergeant Myers | Zeke | 1 | 1 |
| Steffani Brass | Shelly Burke | Eliza | 1 | 1 |
| Beverly Polcyn | Marjorie | Old Lady Employee | 2 | 1 |
| Amy Higgins | Victoria | Rowena | 1 | 1 |
| Carlease Burke | Policewoman | Janice | 1 | 1 |
| Jean Sincere | Gladys | Old Woman | 1 | 1 |
| Jerry Hauck | Umpire | Co-Worker | 1 | 1 |
| Joe Costanza | Mitchell | Harry Pinkman | 1 | 1 |
| Joe O'Connor | Mr. Scott | Jones | 1 | 1 |
| Kareem Grimes | B.G. | Private Carter | 1 | 1 |
| Kim Delgado | Taxi Driver | Newsman | 1 | 1 |
| Michael Emanuel | Homer Grant | Angry Dad | 1 | 1 |
| Michael Monks | Mr. Vennerbeck | Grossman | 1 | 1 |
| Sean G. Griffin | Dr. Frost | Judge | 1 | 1 |
| Terry Woodberry | Cop | Bill | 1 | 1 |
| E.J. De La Pena | Kirby | Boy | 1 | 1 |
| Eric Fleeks | Cop | Ref | 1 | 1 |
| Lorin McCraley | Gillie | Ginsberg | 1 | 1 |
| Norma Michaels | Rose Franklin | Ethel | 1 | 1 |
| Rick Hall | Detective in Larkin Case | Vince | 1 | 1 |
| Rusty Flood | Kid | Oscar | 1 | 1 |
| Shannon Whirry | Doreen Brant | Beautiful Woman | 1 | 1 |
| Skip O'Brien | Larry Brody | Worker | 1 | 1 |
| Thomas Bellin | Wilson Wolfe | Old Vender | 1 | 1 |
| Albert Owens | Cardiologist Zane | Off. Jones | 1 | 1 |
| Barry Sigismondi | Hamer | Officer O'Shannon | 1 | 1 |
| Coleen Maloney | Mrs. Tierny | Student #2 | 1 | 1 |
| Cyndi Martino | Jane | Nurse Kathy | 1 | 1 |
| John Lacy | Kevin Poole | Spectator | 1 | 1 |
| John Maynard | Flasher | Father | 1 | 1 |
| Patrick Thomas O'Brien | Carmichael | Dad Driver | 1 | 1 |
| Sally Ann Brooks | Allison | Seth's Mom | 1 | 1 |
| Tiana Danielle Kenney | Partial Amputation Scout | Buttercup #2 | 1 | 1 |
| Tom McCleister | Larry | Chef Arnold | 1 | 1 |
| Ursula Whittaker | Gloria | Dream Woman | 1 | 1 |
| Luis Chávez | Roger | Private Meadow | 2 | 1 |
| Charlie Stewart | Albert | Kid #2 | 1 | 1 |
| Elizabeth Penn Payne | Margie | Woman | 1 | 1 |
| Larry Udy | Evidence Tech | Buzz | 1 | 1 |
| Mary Wickliffe | Evidence Tech | Fran | 1 | 1 |
| Miles Marsico | David Bradley | Ian | 1 | 1 |
| Paityn James | Leanne | Siobhan | 1 | 1 |
| Tom Towles | Teenage Boy's Father | Ethan | 1 | 1 |
| Asante Jones | Workman #1 | Lighting Guy | 1 | 1 |
| Christopher Gerse | Viktor | Red Krelboyne | 1 | 1 |
| Ellis E. Williams | McClintock | Patient | 1 | 1 |
| Steven Barr | Construction Foreman | Deputy | 1 | 1 |
| P.J. O'Connor | Gary | Executive #3 | 1 | 1 |
| Jake Richardson | Ian Summerlin | Skater Mike | 1 | 1 |
| Scott Cummins | Hank | Officer | 1 | 1 |
| Stephen Rockwell | Dr. Morton | Mort | 1 | 1 |
| Katya Abelski | Christy | Little Girl | 1 | 1 |
| Smalls | Earl | Burly Guy | 1 | 1 |
| Joey Hiott | Ian | Crying Guy | 1 | 1 |
| Jonathan Palmer | Dr. Blevins | Salesman | 1 | 1 |
| Yolanda Snowball | Neighbor | Woman | 1 | 1 |
| Jonathan Nail | Jim Singer | Medic | 1 | 1 |
| Connor Matheus | Ian Parker | Billy | 1 | 1 |
| Steve Tom | MacPherson | Mr. Jacobson | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.