All 227 actors in both Ally McBeal and ER
227 actors have appeared in both Ally McBeal and ER, across 443 episodes. The most-credited is John Aylward, Owen Cobb in Ally McBeal and Dr. Donald Anspaugh in ER.
| Actor | In Ally McBeal | In ER | Eps | Eps |
|---|---|---|---|---|
| John Aylward | Owen Cobb | Dr. Donald Anspaugh | 1 | 74 |
| Albert Hall | Judge Seymore Walsh | James Anderson | 51 | 1 |
| Lily Mariye | Dr. Franklin | Nurse Lily Jarvik | 1 | 127 |
| Lisa Nicole Carson | Renee Radick | Carla Reece | 1 | 29 |
| Kathleen Wilhoite | Janie Bittner | Chloe Lewis | 1 | 19 |
| Gina Philips | Sandy Hingle | Nurse Kathy | 10 | 1 |
| Jami Gertz | Kimmy Bishop | Dr. Nina Pomerantz | 5 | 6 |
| James Le Gros | Mark Albert | Dr. Max Rocher | 5 | 3 |
| Amy Aquino | Dr. Harper | Dr. Janet Coburn | 1 | 26 |
| Sam Anderson | Mark Harrison | Dr. Jack Kayson | 1 | 19 |
| Lucy Liu | Ling Woo | Mei-Sun Leow | 7 | 3 |
| Larry Brandenburg | Judge Raynsford Hopkins | Mr. Lensky | 3 | 1 |
| Michael Gross | Mr. Volpe | John "Jack" Carter | 1 | 6 |
| Harrison Page | Rev. Mark Newman | Stan | 6 | 4 |
| Lisa Edelstein | Cindy McCauliff | Aggie Orton | 5 | 1 |
| Phil Leeds | Judge Dennis "Happy" Boyle | Husband | 5 | 1 |
| Jack Shearer | Judge Alan Rancor | Hal Grunwald | 4 | 1 |
| Paul Dooley | Nicholas Engblume | Henry Lewis | 1 | 4 |
| Harry Lennix | Mr. Ballard | Dr. Greg Fischer | 1 | 6 |
| Austin Tichenor | A.D.A. Tisbury | Mr. Sumpter | 3 | 1 |
| Paula Newsome | Phyllis Butters | Rehab Receptionist Margaret | 1 | 1 |
| Eric Payne | Todd Paradisio | Billy Wilder, Cop, Officer Beechum | 1 | 8 |
| Steven Culp | Attorney Dixon | Dave Spencer, Dr. Charles Cameron | 2 | 5 |
| Alaina Reed-Hall | Judge Elizabeth Witt | Betty Dixon | 3 | 2 |
| Valerie Mahaffey | Dr. Sally Muggins | Joi Abbott | 1 | 4 |
| Cynthia Calhoun | Singer | Becca | 7 | 1 |
| Holland Taylor | 2nd Woman in Face Bra Infomercial, Judge Roberta Kittleson | Phyllis Farr | 2 | 1 |
| Julianne Nicholson | Jenny Shaw | Jordan Dunn | 1 | 2 |
| Raphael Sbarge | Attorney Burlingham | Mr. Kirkendall | 1 | 2 |
| Richard Riehle | Jack Billings | Mandrake Patient | 2 | 1 |
| Rosemary Forsyth | Judge Martha Graves | Judy | 2 | 1 |
| Mary Mara | Julie Stall | Loretta Sweet | 1 | 9 |
| Roma Maffia | Attorney Beckerwith | Ms. Prager | 1 | 3 |
| Vyto Ruginis | Mr. Goodman | Paramedic Wright | 1 | 3 |
| Caitlin Dulany | Laura Jewell | Heather Morgan | 1 | 4 |
| Nancy Lenehan | Principal Deborah Harkness | Edie Harvell | 2 | 1 |
| Norma Michaels | Elderly Lady | Rose Franklin | 2 | 1 |
| Steve Vinovich | Jerry Burrows | Wayne Lentloff | 1 | 2 |
| Wallace Shawn | Mr. Dune | Teddy Lempell | 1 | 1 |
| Željko Ivanek | Judge Marshal Pink | Bruce Resnick | 1 | 1 |
| David Spielberg | TV Station Executive Colkod | Dr. Neil Bernstein | 1 | 4 |
| Bruce Nozick | Attorney | Craig Simon | 2 | 2 |
| Clyde Kusatsu | Dr. Myron Okubo | Review Board Doctor #1 | 2 | 1 |
| Holmes Osborne | Det. Gerard Billow, Principal Figgins | Dr. Sayers | 2 | 1 |
| J. Karen Thomas | Karen Martin-Gray | Prisoner Transport Officer | 2 | 1 |
| Keene Curtis | Judge Johnson Hawk | Gilbert McCabe | 2 | 1 |
| Ken Lerner | Attorney Dick Raditz | Harry Stopak, Stan Seidel | 1 | 2 |
| Mark Moses | Attorney Hoover | Mr. Marks | 2 | 1 |
| Mary-Pat Green | Judge Julia 'Bulldog' Brattle | Miss McDuffy | 2 | 1 |
| Natasha Gregson Wagner | Hannah Puck | Mary Warner | 1 | 2 |
| Robert Clendenin | Benjamin Winter | Anesthesiologist | 2 | 1 |
| Anne Haney | Brandy Engblume | Mrs. Packer | 1 | 1 |
| Anne-Marie Johnson | D.A. Foster | Sickle Cell Patient | 1 | 1 |
| Betty A. Bridges | Clerk, Foreperson | Cashier | 3 | 1 |
| Brigid Brannagh | Paula | Jamie Hendricks | 1 | 1 |
| Frederick Koehler | Marcus | Benjamin Coe | 1 | 1 |
| Michael Kagan | Robert Perry | Chuck Arteburn | 1 | 1 |
| Susan Blommaert | Judge Rudy Fox | Sarah McKenzie | 1 | 1 |
| Susan Krebs | Judge Lee Kensington | Transplant Surgical Nurse | 1 | 1 |
| Daniel Dae Kim | Officer Pratt | Ken Sung | 1 | 4 |
| Amy Pietz | Bonnie Boone | Loren | 2 | 1 |
| Andy Umberger | Mr. Fordham | Dr. David Harvey | 1 | 2 |
| Katie Mitchell | Patti Horton | Shelley | 1 | 2 |
| Ted Marcoux | Louis Walters | Derek Fossen | 1 | 2 |
| Christopher Michael | Bailiff, Police Officer | Security Officer | 2 | 5 |
| Brad Blaisdell | Dr. Alfonso Moreno | Detective | 1 | 3 |
| Dwier Brown | Steven | Dr. David Herlihy | 1 | 3 |
| Ashley Johnson | Serena Feldman | Dana Ellis | 1 | 2 |
| Dan Martin | Principal Jolie | Lieutenant | 1 | 1 |
| Drew Snyder | Hughes | Mr. Drane | 1 | 1 |
| Eric Pierpoint | James Horton | Mr. Dwyer | 1 | 1 |
| Jennifer Rhodes | Gladys Claven | Mrs. Henry | 1 | 1 |
| Jim O'Heir | Steve Mallory | McKenna | 1 | 1 |
| Liz Torres | Hanna Goldstein | Sarah Wilson | 1 | 2 |
| Robert Costanzo | George Chisholm | Pernicious Anemia Man | 1 | 1 |
| Ron Fassler | Defendant's Lawyer | Mr. Rosen | 1 | 1 |
| Rusty Schwimmer | Angela Tharpe | Grollman | 1 | 1 |
| Shirley Knight | Helen Apple | Mrs. Burke | 1 | 1 |
| Tom Virtue | Ally's Father | Pares | 1 | 1 |
| Tony Plana | Judge Warren Figueroa | Priest | 1 | 1 |
| Christopher John Fields | Mr. Goodman's Attorney | Dr. Phil Tobiason | 1 | 2 |
| Conor O'Farrell | Attorney Jordan | Richard Abbott | 1 | 2 |
| James Mathers | Dr. Carpenter | Roth, Security Guard | 1 | 2 |
| Julius Tennon | Officer | Mr. Stegman, Uniform Cop | 1 | 2 |
| Terry Walters | Andrea Bassett | Mrs. Angevine | 2 | 1 |
| Valeri Ross | Security Officer | McGillis | 1 | 4 |
| Audrey Wasilewski | Maureen Ringer | Officer Wetterling | 1 | 1 |
| Carmen Argenziano | Harry Wah | Howard Davis | 1 | 1 |
| Cristine Rose | Marci Hatfield | Mrs. Martinez | 1 | 1 |
| Jamie Rose | Sandra Winchell | Marilyn Bracken | 1 | 1 |
| Kate McNeil | Marianne Harper | Mrs. Pendry | 1 | 1 |
| Lenny Wolpe | James Russell | Dr. George Hudson | 1 | 1 |
| Lily Knight | Mrs. Nichols | Mary Cochran | 1 | 1 |
| LisaGay Hamilton | Rebecca Washington | Nadine Hopkins | 1 | 1 |
| Mary Beth McDonough | Attorney Gloria Stepp | Jean Twomey | 1 | 1 |
| Michael Hyatt | Stage Manager | Yvonne Devilliere | 1 | 1 |
| Michael Reilly Burke | Mr. Wells | Dick White | 1 | 1 |
| Patrick Breen | Kevin Stoller | Felix | 1 | 1 |
| Paul Collins | Judge Williams | Dr. Norm Middleton | 1 | 1 |
| Peter MacKenzie | Kendall Stevens | Mr. Pasbalas | 1 | 1 |
| Randy Oglesby | Harvey Kent | PICU Doctor | 1 | 1 |
| Robert Picardo | Barry Philbrick | Abraham Zimble | 1 | 1 |
| Romy Rosemont | Marie Hall | Joanne Bairos | 1 | 1 |
| Sara Botsford | Attorney Post | Mrs. Calder | 1 | 1 |
| Susan Merson | Judge Stoller | Mrs. Blum | 1 | 1 |
| Thomas Kopache | Judge Oscar Boyle | Dr. Stofsky | 1 | 1 |
| Davenia McFadden | Assistant to Tina Turner | April Robinson, Mrs. Bevins | 1 | 2 |
| Michael Gaston | Mark Horace | U.S. Marshal Rick Cromley | 2 | 1 |
| Amanda Carlin | Mindy Horton | Librarian | 1 | 1 |
| Annie Abbott | Lucy Taylor | Mrs. Torledsky | 1 | 1 |
| Armin Shimerman | Judge Walworth | Levine | 1 | 1 |
| Christian Clemenson | Mr. Hookland | Dr. Kurtag | 1 | 1 |
| Don Perry | Foreman | Dr. Stan Breedlove | 1 | 2 |
| Earl Billings | Ray's Client | Ray Jamison | 1 | 1 |
| Eileen Ryan | Bria Tolson | Barbara Dean | 1 | 1 |
| Elizabeth Ruscio | Cynthia Pierce | Sarah Logan | 1 | 1 |
| Eric Christmas | Judge Maynard Snipp | Mr. Heath | 1 | 1 |
| Eyal Podell | Attorney Whoople | Sammo | 1 | 1 |
| Gregg Daniel | Doctor | Mr. Powell | 1 | 1 |
| Holliston Coleman | Cara Dawson - Age 4 | Brianne Cooper | 1 | 1 |
| John Short | Larry | Dr. Schlansky | 1 | 1 |
| Judith Moreland | D.A. Sharon Anderson | Nurse Terry | 1 | 1 |
| Lauren Bowles | Callie Horne | Hannah | 1 | 1 |
| Louis Giambalvo | Harold Jordan | Security Guard David Hilliker | 1 | 1 |
| Lydia Look | Leigh Woo | Emily Fong | 1 | 1 |
| Madison McReynolds | Lucy | Hannah | 2 | 1 |
| Mark Tymchyshyn | Attorney Henson Lyne | Mr. Pruitt | 1 | 1 |
| McNally Sagal | Mary Halliday | Madeline | 1 | 1 |
| Michael Tomlinson | Dr. Schulman | Dr. Keith Fecteau | 1 | 1 |
| Neil Giuntoli | Ralph Witton | Alan | 1 | 1 |
| Richard Schiff | Bernie Gilson | Mr. Bartoli | 1 | 1 |
| Victor McCay | Gilbert Breen | Dr. Ramsey | 1 | 1 |
| Luck Hari | Dr. Keshin | Lakshmi, OB Nurse | 1 | 2 |
| Ashley Gardner | Martha Claven | Simone Phillips | 1 | 1 |
| Ben Livingston | Jeri / Gerry Byrd | Mr. Gattney | 1 | 1 |
| Brad Grunberg | Emcee | Masked Man | 1 | 1 |
| Carol Locatell | Judge Henrietta Fullem | Landlady | 1 | 1 |
| Clare Carey | Mary Clapp | Shauna | 1 | 1 |
| Claudette Nevins | Ms. Hollings | Judge | 1 | 1 |
| Greta Sesheta | Foreperson | Mrs. Bassett | 1 | 1 |
| John Maynard | Clerk | Flasher | 1 | 1 |
| John Thaddeus | Michael Young | Keith Nelson | 1 | 1 |
| Laura Henry | Heckler #3 | Lisa Halloran | 1 | 1 |
| Michael Mantell | Joseph Shapiro | Mr. Spencer | 1 | 1 |
| Michael O'Neill | Dr. Colbert | Col. Ken Kilner | 1 | 1 |
| Nate Reese | Clerk | Server #2 | 1 | 1 |
| Nelson Mashita | Foreperson | Kazuo | 1 | 1 |
| Peter Scolari | Mr. Hooley | Kyle Evans | 1 | 1 |
| Angela Sargeant | Attorney Halpern | Shannon | 1 | 1 |
| Bob Glouberman | Wally Pike | Jeff | 1 | 1 |
| Charley Lang | Mr. Brickle | Jason Warren | 1 | 1 |
| Cleo King | Ms. Parks | Mrs. Davies | 1 | 1 |
| Emmett Shoemaker | Jacob Ray | Ben Fossen | 1 | 1 |
| James Kiriyama-Lem | Foreman | Dr. Mitsuma | 1 | 1 |
| Jay Leggett | Harry Pippen | Canelli | 1 | 1 |
| Kathryn Joosten | Sister Alice | Lois | 1 | 1 |
| Kenneth Kimmins | Mr. Forsley | Mr. Spevacek | 1 | 1 |
| Lacey Kohl | Sandy | Pratt's Date | 1 | 1 |
| Mary Wickliffe | Ms. Findley | Evidence Tech | 1 | 1 |
| Mike Hagerty | Michael Huttle | Mr. James | 1 | 1 |
| Paul Perri | Attorney Serrano | Monty | 1 | 1 |
| Tripp Law | Bailiff | Mr. Fuhrbusch | 1 | 1 |
| Wilson Cruz | Stephanie Grant | Jeffrey Cruz | 1 | 1 |
| Cheyenne Wilbur | Foreman | Garrity | 1 | 1 |
| Christine Tucci | Nancy Raleigh Sicland | Paula Trancoso | 1 | 1 |
| Harvey J. Alperin | Foreman | Dr. Saunders | 1 | 1 |
| Jody Wood | Officer Kent | Mr. Casey | 1 | 1 |
| Kim Delgado | Court Clerk | Taxi Driver | 1 | 1 |
| Michael Albala | Goofball | County Anesthesiologist | 1 | 1 |
| Ronald Hunter | Det. Greene | Juror Two | 1 | 1 |
| Sharon Omi | Bailiff | Nurse Sulla | 1 | 1 |
| Dakota Fanning | 5 Year Old Ally | Delia Chadsey | 1 | 1 |
| George Anthony Bell | Congregant | Second Reporter | 1 | 1 |
| Gwen McGee | Nurse Atkins | O.B. Chong | 1 | 1 |
| Jean Sincere | Mary Ellen | Gladys | 1 | 1 |
| Jesse D. Goins | Det. Chouinard | Mr. Paige | 1 | 1 |
| Judith Drake | Foreperson | Greta | 1 | 1 |
| Ken Abraham | Hendrix | Sean | 1 | 1 |
| Mark Ankeny | Foreman | Electrician | 1 | 1 |
| Marty Levy | TV Announcer | tbd | 1 | 1 |
| Michael Galeota | Billy (ages 12-14) | Joseph O'Connor | 1 | 1 |
| Micheal DiMaggio | Sean | Katie's Father | 1 | 1 |
| Missy Yager | Molly | Nicole Woodman | 1 | 1 |
| Peter Birkenhead | Steve | Bite Victim's Father | 1 | 1 |
| Ralph P. Martin | Trainer Jim | Woody | 1 | 1 |
| Amy Bruckner | Hayley | Ariel | 1 | 1 |
| David Dunard | Judge Hupp | Irish Guy | 1 | 1 |
| Eric Fleeks | Trainer Joe | Cop | 1 | 1 |
| James Sutorius | Daley's Attorney | Dr. Abrams | 1 | 1 |
| Mary-Margaret Lewis | Foreperson | Maid | 1 | 1 |
| Patricia Belcher | Marsha Forrester | Ward Nurse | 1 | 1 |
| Richard Penn | Dr. Yellen | Dave Donovan | 1 | 1 |
| Robert Blanche | Officer | Detective Milne | 1 | 1 |
| Scott Klace | Dr. Hobey | Chris Halpern | 1 | 1 |
| Sean G. Griffin | Minister | Dr. Frost | 1 | 1 |
| Shirley Jordan | Nancy Sosha | IDC Analyst | 1 | 1 |
| Bailey Thompson | Jean Horton | Wendy Toby | 1 | 1 |
| Bert Rosario | Arturo Sandoval | Damien | 1 | 1 |
| Garret Davis | Guard | Mr. Davis | 1 | 1 |
| Jim Jansen | Harvey Shiplett | Neonatologist | 1 | 1 |
| Ron Taylor | Singer in Bar | Bob | 1 | 1 |
| Scott Rabinowitz | A.D.A. Phillips | Ralph | 1 | 1 |
| Stephon Fuller | Photographer | Transport Tech Jim | 1 | 1 |
| Warren Sweeney | Ken Falco | Mr. Tierny | 1 | 1 |
| Helen Eigenberg | A.D.A. Kettering | Renee Weber Stewart | 1 | 1 |
| Lisa Brounstein | Beatrice | Wanda Jean Meredith | 1 | 1 |
| Lorna Raver | Judge N. Saturn | Dr. Anne Adelstein | 1 | 1 |
| Patrick Pankhurst | Dr. Stewart | Dr. York | 1 | 1 |
| Travis McKenna | Portman | Mr. DeMisa | 1 | 1 |
| Bret Loehr | Boy | Matthew | 1 | 1 |
| Geoffrey Wade | Dr. Kipperman | Darrell Amos | 1 | 1 |
| Jacy DeFilippo | Girlfriend #4 | Kim | 1 | 1 |
| Linda Kerns | Pamela Whoop | Mrs. Bohlmeyer | 1 | 1 |
| Mike Randleman | Warren Stephenson | Cop - 1 | 1 | 1 |
| Skip O'Brien | Police Officer | Larry Brody | 1 | 1 |
| Al Pugliese | Joel Hurt | Angelo | 1 | 1 |
| Joanna Sanchez | Janine Waller | Mrs. Trajillo | 1 | 1 |
| Jorge Luis Abreu | Waiter | Security Guard | 1 | 1 |
| Maggie Egan | Foreperson | Kathleen Horne | 1 | 1 |
| Verda Bridges | Drill Sergeant | May Crawford | 1 | 1 |
| Amy Warner | Dr. Wazard | Nurse | 1 | 1 |
| Carol Kline | Auditioner - Chorus Line | Saleslady | 1 | 1 |
| David Weisenberg | Tailor | Hanukkah Harry | 1 | 1 |
| Gregory North | Dr. Lutz | Dr. Neiser | 1 | 1 |
| Eve Brenner | Old Ally | Wilma | 1 | 1 |
| Jessica Townsend | Wendy | Alice Jenkins | 1 | 1 |
| Paityn James | Andrea Mason | Leanne | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.