All 85 actors in both ER and The Fosters
85 actors have appeared in both ER and The Fosters, across 435 episodes. The most-credited is Lyn Alicia Henderson, Paramedic Pamela Olbes in ER and Social Worker / Lisa in The Fosters.
| Actor | In ER | In The Fosters | Eps | Eps |
|---|---|---|---|---|
| Lyn Alicia Henderson | Paramedic Pamela Olbes | Social Worker / Lisa | 149 | 2 |
| Lorraine Toussaint | Yolanda | Dana Adams | 1 | 9 |
| Alex Skuby | Renato (Medivac) | Joe Gray | 2 | 9 |
| Suzanne Cryer | Toni Stillman | Jenna Paul | 1 | 6 |
| April Parker Jones | Joyce | Captain Roberts | 1 | 8 |
| Chris Bruno | Richie | Adam Stevens | 1 | 9 |
| Justina Machado | Officer Claudia Diaz, Ms. Cruz | Sofia Rivera | 9 | 3 |
| Marlene Forte | Mrs. Gonzalez | Elena Gutierrez | 1 | 7 |
| Judy Kain | Thomas | Lauren | 1 | 8 |
| Reiley McClendon | Aaron James | Vico Cerar | 1 | 8 |
| Tony Plana | Priest | Victor Gutierrez | 1 | 6 |
| Norma Maldonado | Munoz | Karina Sanchez | 2 | 5 |
| Fran Bennett | Michelle, Phyllis | Iris | 2 | 2 |
| Jamie McShane | Josh Rushing | Donald Jacob | 1 | 7 |
| Mercedes Colon | Detective | Margo Velasquez | 1 | 7 |
| Michael Patrick McGill | Detective Ed Bernstein, Security #1, Officer Jeffries | Coach Spears | 6 | 6 |
| Annamarie Kenoyer | Ruthie Pooler | Becka | 1 | 7 |
| Sam McMurray | Mike Landry | Frank Cooper | 1 | 5 |
| Page Leong | Gloria, Erin | Dr. Kodema | 3 | 3 |
| Ricardo J. Chacon | Eddie | Mexican Policia | 1 | 2 |
| Romy Rosemont | Joanne Bairos | Amanda Rogers | 1 | 4 |
| Shi Ne Nielson | Med Student Sheila | Kate O'Brien | 4 | 2 |
| David Douglas | Miller | Chris The Teacher | 1 | 4 |
| Colby French | Greg Becton | Jim Pearson | 1 | 2 |
| Deborah Lacey | Det. Tincreed | Marie, Attorney | 1 | 6 |
| Emily Kosloski | Amanda | Helen | 1 | 4 |
| John Prosky | Mr. Brooks | Doctor | 4 | 2 |
| John Rubinstein | Dr. Kenner | Henry Marshall | 1 | 2 |
| Michael Fairman | Mort Harris | Mr. Nesbit | 1 | 1 |
| Stephanie Erb | Mrs. Kinney | Dr. Vivian Hillcroft | 1 | 2 |
| Roxana Brusso | Mari Hinjosa | Detective Fernandez | 1 | 3 |
| Tim Russ | Dr. Medford | Judge James Eskin | 1 | 2 |
| Geoffrey Rivas | Haven | Bill | 1 | 1 |
| John Marshall Jones | Mr. Gaither | Detective Bruckner | 1 | 2 |
| Karis Campbell | Mrs. Kenig | Karen | 1 | 2 |
| J.R. Cacia | Ogilvie | Dan Cruz | 1 | 3 |
| Charles Emmett | Derezin | Bus Driver | 1 | 1 |
| P.J. Marino | Officer Jaeger | Vice Cop | 1 | 3 |
| Alessandra Torresani | Kate Preston | Brooke | 1 | 2 |
| Jenny O'Hara | Nurse Rhonda Sterling | Melanie's Mom | 2 | 1 |
| Jack Guzman | Morgan | Valet | 2 | 1 |
| Alice Dodd | Mrs. Sumpter | Kelly | 1 | 1 |
| Asante Jones | Workman #1 | Delivery Man | 1 | 1 |
| Kevin Brief | Walter Brosnich | Head Security Guard | 1 | 1 |
| Ross Mackenzie | Fred | Man | 1 | 1 |
| Warren Sweeney | Mr. Tierny | Seller #2 | 1 | 2 |
| Wayne Wilderson | Dr. Claypool | Scott | 1 | 1 |
| Ivar Brogger | Deposition Attorney | Doctor | 1 | 1 |
| Jayne Taini | Marge Satterfield | Helen | 1 | 1 |
| Karimah Westbrook | Sara Morris | Layla's Mother | 1 | 1 |
| Karl T. Wright | Dr. Norris | Attending Doctor | 1 | 1 |
| Kathleen Gati | Stacy Coleman | Bus Driver | 1 | 1 |
| Silvia Curiel | Zoila | Woman | 1 | 1 |
| Alexis Rhee | Mrs. Paik | Mrs. Kim | 1 | 1 |
| Christopher Goodman | Andrew | Tom | 1 | 1 |
| Corbin Bleu | Little Boy | Mercutio | 1 | 1 |
| Monique Edwards | Callie | Nice Lady | 1 | 1 |
| Annie LaRussa | Sylvie | CPS Worker | 1 | 1 |
| Christopher Boyer | Paxton the Opossum | Gus | 1 | 1 |
| Matthew Jones | Cop | Officer Ruiz | 1 | 1 |
| Jarrod Crawford | David "Diamond Z" Zachary | Halfway House Counselor | 1 | 2 |
| Amanda Anka | Mrs. Macaulay | Belinda | 1 | 1 |
| Darryl Alan Reed | Charlie | Apartment Manager | 1 | 1 |
| Eugene Goring II | BIlly | Kid | 1 | 1 |
| James C. Victor | Patrick | Jack Carver | 1 | 1 |
| Kim Estes | Lieutenant Higgins | Judge Alton | 1 | 1 |
| Michael Dempsey | Mr. Beckwith | Davis | 1 | 1 |
| Monica Garcia | Benita Escobar | Concerned Teacher | 1 | 1 |
| Vaughn Armstrong | Greg Mitchell | Mr. Olsen | 1 | 1 |
| William Charlton | Man | Contractor | 1 | 1 |
| Betty Murphy | Nancy | Older Woman | 1 | 1 |
| Cheyenne Wilbur | Garrity | Jogger | 1 | 1 |
| Jillian Armenante | Tamara Gordon | Shaz | 1 | 1 |
| Nancy Youngblut | Sarah Howe | Judge | 1 | 1 |
| Joshua Wolf Coleman | Respiratory Therapist | Ty's Attorney | 1 | 1 |
| Kim Delgado | Taxi Driver | Bryan | 1 | 1 |
| Lynn Milgrim | Ms. Crandell | Beth Green | 1 | 1 |
| Pablo Espinosa | Driver John | Officer Juarez | 1 | 1 |
| Sergio Enrique | Cole | Bartender | 1 | 1 |
| Alain Uy | Burke | ADA | 1 | 1 |
| Chelsea Rendon | Araceli | Social Worker / Lisa | 1 | 1 |
| Sonia Jackson | Ruthie Newton | Substitute Teacher | 1 | 1 |
| Jeremy Glazer | Med Student David | Jeff Stolland | 1 | 1 |
| Wayne Lopez | Benitez | Wade | 1 | 1 |
| Mari Weiss | Vicki | Orthopaedist | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.