All 70 actors in both ER and Young Sheldon
70 actors have appeared in both ER and Young Sheldon, across 472 episodes. The most-credited is Lyn Alicia Henderson, Paramedic Pamela Olbes in ER and Sally in Young Sheldon.
| Actor | In ER | In Young Sheldon | Eps | Eps |
|---|---|---|---|---|
| Lyn Alicia Henderson | Paramedic Pamela Olbes | Sally | 149 | 1 |
| Wallace Shawn | Teddy Lempell | Dr. John Sturgis | 1 | 53 |
| Nancy Linehan Charles | Glenda Walton | Peg | 1 | 19 |
| Ming-Na Wen | Dr. Jing-Mei "Deb" Chen | Dr. Carol Lee | 8 | 1 |
| Valerie Mahaffey | Joi Abbott | Ms. Victoria MacElroy | 4 | 14 |
| Bob Newhart | Ben Hollander | Professor Proton | 3 | 3 |
| Dan Byrd | Russ | Pastor Rob | 1 | 8 |
| Octavia Spencer | Maria Jones | Officer Rhonda Thomason | 1 | 1 |
| Vernée Watson | April Wilson | Nurse Robinson | 2 | 2 |
| Bill Chott | Glen Ashman | Dean, Franklin | 1 | 2 |
| Brent Jennings | Nat | Henry | 3 | 1 |
| Drew Powell | Dennis Voltaire | Roy | 1 | 3 |
| Valeri Ross | McGillis | Harriet | 4 | 1 |
| Giovannie Espiritu | Med Student Ludlow | Nurse | 4 | 2 |
| Diane Ladd | Mrs. Pooler | Hortense | 1 | 1 |
| Frances Conroy | Becky Riley | Dr. Flora Douglas | 2 | 1 |
| Ray Liotta | Charlie Metcalf | Vincent | 1 | 1 |
| Rocky McMurray | Sergeant Myers | Judge Landry | 1 | 1 |
| Wallace Langham | Dr. Melvoin | Dr. Edward Pilson | 1 | 1 |
| Rebecca Metz | Waitress | Officer Gilroy | 1 | 2 |
| Tim Griffin | Captain John Evans | Clint Watson | 2 | 1 |
| Amy Farrington | Sandy Mader | Dr. Sandra Thorpe | 1 | 1 |
| Cleo King | Mrs. Davies | Mrs. Costello | 1 | 1 |
| Dennis Cockrum | Little League Player's Father | Mr. Stover | 1 | 1 |
| Michael Cudlitz | Lang | NASA Director | 1 | 1 |
| Eddie Shin | Med Student Stanley Mao | Mr. Stevens | 2 | 1 |
| John Mariano | Leonard | Envelope, Richard Feynman | 1 | 2 |
| Marty Ryan | Brant | Umpire | 2 | 1 |
| Brian Chenoweth | Radiology Tech | Prayer Group #4 | 2 | 1 |
| Jayne Taini | Marge Satterfield | Phyllis | 1 | 1 |
| Jeff Doucette | Larkowski | Leslie Gance | 1 | 1 |
| Robert Picardo | Abraham Zimble | Professor Salzman | 1 | 1 |
| Zoran Radanovich | Niko Kovač | Russian Dad | 3 | 1 |
| Carlease Burke | Policewoman | Mrs. Ebner | 1 | 1 |
| Corey Mendell Parker | Byron Evers | Customer | 1 | 1 |
| Eileen Galindo | Heather Tocci | Mrs. Howard | 1 | 1 |
| Gary Ballard | Arnold Plum | Herman | 1 | 1 |
| Patricia Belcher | Ward Nurse | Clara | 1 | 1 |
| Tom Virtue | Pares | Father Donovan | 1 | 1 |
| Tony Winters | Hotel Staffer | Conductor | 1 | 1 |
| Andy Umberger | Dr. David Harvey | Mr. Anderson | 2 | 1 |
| Audrey Wasilewski | Officer Wetterling | Joann | 1 | 1 |
| Carol Ann Susi | Mrs. Clark | Mrs. Wolowitz | 1 | 1 |
| Duane R. Shepard, Sr. | Janitor | Mr. Bustifer | 1 | 1 |
| Judith Drake | Greta | Mildred | 1 | 1 |
| Sharon Omi | Nurse Sulla | Librarian | 1 | 1 |
| Stewart Skelton | John Taylor | Dr. Adams | 1 | 1 |
| Teddy Vincent | Vivian Nickelby | Woman on Bus | 1 | 1 |
| Wayne Wilderson | Dr. Claypool | Dr. Gilbert | 1 | 1 |
| Jim Cody Williams | Boudreau | Lyle | 1 | 1 |
| Lauri Hendler | Lenore Bee | Janet | 1 | 1 |
| Asante Jones | Workman #1 | Chip | 1 | 1 |
| Bob Glouberman | Jeff | Mr. Jensen | 1 | 1 |
| J. Rene Pena | Mrs. Mode | Caroline | 1 | 1 |
| Jaxy Boyd | Shelby Krane | Prayer Group #5 | 1 | 1 |
| Jeremy Guskin | Knight | Andy | 1 | 1 |
| Marla Gibbs | Cherise Barnes | Doris | 1 | 1 |
| Bunnie Rivera | Maria | Prayer Group #1 | 1 | 1 |
| David Weisenberg | Hanukkah Harry | Professor #1 | 1 | 1 |
| Donna Pieroni | Wuss | Female Patron | 1 | 1 |
| John Rubinstein | Dr. Kenner | Rabbi Schneiderman | 1 | 1 |
| Bob Rumnock | Phillip Berk | Older Man | 1 | 1 |
| Martin Garcia | Airline Employee | Mr. Nelson | 1 | 1 |
| Monica Garcia | Benita Escobar | Coughing Teacher | 1 | 1 |
| Shane Blades | Marcus Udesky | Actor #2 | 1 | 1 |
| Wiley Pickett | Impaled Man | FBI Agent #1 | 1 | 1 |
| Lenora May | Review Board Doctor #2 | Patricia | 1 | 1 |
| Bianca Lopez | Monica | Pregnant Woman | 1 | 1 |
| Celestial | Temp Nurse #3 | Eileen | 1 | 1 |
| Susan Grace | Gloria | Older Woman | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.