All 94 actors in both ER and This Is Us
94 actors have appeared in both ER and This Is Us, across 437 episodes. The most-credited is Conni Marie Brazelton, Nurse Connie Oligario in ER and Judge Theresa Shaw in This Is Us.
| Actor | In ER | In This Is Us | Eps | Eps |
|---|---|---|---|---|
| Conni Marie Brazelton | Nurse Connie Oligario | Judge Theresa Shaw | 113 | 1 |
| Kristin Minter | Randi Fronczak | Ms. Dobson | 70 | 1 |
| Yvonne Zima | Rachel Greene | Nicole | 22 | 1 |
| Omar Epps | Dr. Dennis Gant | Darnell Hodges | 10 | 3 |
| Peter Onorati | Officer Nick Napolitano | Stanley Pearson | 1 | 12 |
| Milana Vayntrub | Tatiana | Sloane Sandburg | 3 | 8 |
| Michael Angarano | Zack | Nicky Pearson | 1 | 6 |
| Sam Anderson | Dr. Jack Kayson | Judge Walter Crowder | 19 | 1 |
| Jami Gertz | Dr. Nina Pomerantz | Marin Rosenthal | 6 | 1 |
| Vien Hong | Young Banger | Hai Lang | 1 | 4 |
| Sumalee Montano | Duvata Mahal | Dr. Gail Jasper | 10 | 2 |
| Scott Michael Campbell | EMT Reilly Brown | Commanding Officer Sheehan | 7 | 2 |
| Garrett Morris | Edgar Luck | Lloyd | 1 | 3 |
| Judy Kain | Thomas | Barbara | 1 | 1 |
| Debra Jo Rupp | Mrs. Dibble | Linda | 1 | 4 |
| George Eads | Paramedic Greg Powell | Coach Stikes | 3 | 2 |
| Dan Lauria | Rick Simpson | Mr. Damon | 1 | 2 |
| Carl Lumbly | Dr. Graham Baker | Abe Clarke | 2 | 2 |
| Michael Ironside | Dr. William Swift | Mr. Pearson | 7 | 1 |
| Ryan Michelle Bathé | Miss Evelyn | Yvette | 1 | 3 |
| Gary Kraus | CJ | Gus | 1 | 1 |
| Rebecca Metz | Waitress | Martina | 1 | 1 |
| Stuart McLean | X-Ray Tech, Mike Devore | Clyde | 12 | 1 |
| Tom Virtue | Pares | Dr. Grader | 1 | 2 |
| Michael O'Neill | Col. Ken Kilner | Arlo | 1 | 1 |
| Rosalind Chao | Dr. Theresa Chow | Anna | 1 | 1 |
| Sonia Jackson | Ruthie Newton | Female Doctor | 1 | 1 |
| Stefanie Black | Tiffany | Charlotte Everly | 1 | 1 |
| Jeremy Luke | Thomas Grasso | Darryl McGee | 1 | 2 |
| Mo McRae | Kevin Hightower | Déjà's Father | 1 | 2 |
| Ren Hanami | NICU Nurse | Dr. Salzman | 2 | 1 |
| Debra Mooney | Leila Morgan, Barbara Feingold | Mrs. Peabody | 3 | 1 |
| John Rubinstein | Dr. Kenner | Ron Schiller | 1 | 3 |
| Christopher Grove | Dr. Marty Kline | Gardening Client | 4 | 1 |
| David DeLuise | Brad Anderson | Bill Lundy | 1 | 1 |
| Jim Cody Williams | Boudreau | Mike McCreary | 1 | 1 |
| Shirley Jordan | IDC Analyst | Happy Grandma | 1 | 1 |
| Tom Parker | Matt Gilespie | Madison's Father | 1 | 1 |
| Danielle Larracuente | Lizzie | Laila | 1 | 3 |
| Ken Lerner | Harry Stopak, Stan Seidel | Brandon Novak | 2 | 1 |
| Michael Hagiwara | Steve Sakabu | Dr. Takebe | 1 | 2 |
| Carlease Burke | Policewoman | Bernice | 1 | 1 |
| LisaGay Hamilton | Nadine Hopkins | Aunt Mae | 1 | 1 |
| Shelley Robertson | Tanya Phillips | Déjà's Father | 1 | 1 |
| Jernard Burks | Expectant Father | Bus Driver | 1 | 2 |
| Ajgie Kirkland | Monty | Boxing Ring Employee | 1 | 1 |
| Alexis Krause | Mallory | Laura | 1 | 1 |
| Eileen Galindo | Heather Tocci | Older Beatriz Rivas | 1 | 1 |
| Jack McGee | Rodney McMullen | George | 1 | 1 |
| Jamie Chung | Jin Kim | Ava | 1 | 1 |
| Joanne Baron | Virgie | Gina | 1 | 1 |
| Molly Hagan | Meredith Smart | Grace Pendergrass | 1 | 1 |
| Ric Sarabia | Drunk | Pilgrim Rick | 1 | 1 |
| Shaun Duke | Detective, Painter | Ray | 2 | 1 |
| Stewart Skelton | John Taylor | Father Williams | 1 | 1 |
| Yara Martinez | Mia | Amber | 1 | 1 |
| Betsy Baker | Dr. Wheeler | Waitress | 1 | 1 |
| Taneka Johnson | Kris | Taneka, Woman from the Crowd | 2 | 2 |
| Eileen Grubba | TV Reporter | Mrs. Dunn, Teacher | 1 | 2 |
| Jane Daly | Diane Armitage | Sally | 1 | 1 |
| Richard Gant | Mr. Lipson | Albert Jones | 1 | 1 |
| Veena Bidasha | Asha, Belly Dancer #1 | Dr. Molani | 2 | 1 |
| Angela Landis | Kathy | Nurse Laurie | 1 | 1 |
| Mike Bradecich | Officer Brody | Peter Katowski | 1 | 1 |
| Nancy Linari | Elizabeth Puro | Mrs. Sandburg | 1 | 1 |
| Peter James Smith | Mr. Shimahara | Dr. Hugh Lang | 1 | 1 |
| Frederick Dawson | Bus Driver | Glenn | 1 | 1 |
| Sally Ann Brooks | Allison | Nurse Iris | 1 | 1 |
| Wayne Lopez | Benitez | Ned | 1 | 1 |
| Jaxy Boyd | Shelby Krane | Maya Duncan | 1 | 1 |
| Joanna Sanchez | Mrs. Trajillo | Hotel Maid | 1 | 1 |
| Marla Gibbs | Cherise Barnes | Diner Customer | 1 | 1 |
| Ruth Williamson | Registry Nurse | Ellen | 1 | 1 |
| Tony Winters | Hotel Staffer | Dr. Wilton | 1 | 1 |
| Phil Abrams | Rodney | Dr. Weiss | 1 | 1 |
| Time Winters | Emil Savka | Dr. Patterson | 1 | 1 |
| Drew Butler | Jason | TSA Agent #2 | 1 | 1 |
| Ray Laska | Detective Orr | Miguel's Doctor | 1 | 1 |
| Baadja-Lyne Odums | Driver | Ms. Adams | 1 | 1 |
| Evelina Martinez | Sedgewick | Cousin Alicia | 1 | 1 |
| Kim Estes | Lieutenant Higgins | Marcus Duncan | 1 | 1 |
| Sergio Enrique | Cole | Hector | 1 | 1 |
| Donna Pieroni | Wuss | Nurse Virginia | 1 | 1 |
| Eamon Hunt | Mrs. O'Leary's Cow | Doctor | 1 | 1 |
| Pamela Roberts | Mrs. Haney | Doris Jones | 1 | 1 |
| Bill Chott | Glen Ashman | Mailman | 1 | 1 |
| Caryn West | Mrs. Bender | Dr. Lee | 1 | 1 |
| Angela Meryl | Danitra Walker | Woman | 1 | 1 |
| Floyd Van Buskirk | Workman | Jack's Boss | 1 | 1 |
| Stacy Barnhisel | Nancy | Amy | 1 | 1 |
| Brian Chenoweth | Radiology Tech | Lab Supervisor | 2 | 1 |
| Karen Huie | Mrs. Cheung | Nurse Jenna | 1 | 1 |
| Michael Albala | County Anesthesiologist | Dr. Schneider | 1 | 1 |
| Richard Tanner | Dad | Director John | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.