← ER
Each dot represents one of ER's 3,998 cast members
The ER Effect
Academy Awards
8
8
Oscar Winners
23
Total Nominations
Clooney
Best Supporting Actor
Whitaker
Best Actor
Argo
Best Picture
Emmy Awards
14
14
Emmy Winners from Cast
23
Emmys Won by ER Itself
Margulies
Outstanding Lead Actress
McGregor
Lead Actor (Halston)
Newton
Supporting (Westworld)
Box Office
$32B+
$2.5B
Spider-Man Trilogy (Dunst)
$4.5B
Star Wars Prequels (McGregor)
$1.8B
Black Panther (Bassett/Whitaker)
$1.1B
Ocean's Trilogy (Clooney/Cheadle)
$2.8B
Avengers Endgame (Cheadle)
Post-ER Projects
289
156
Films
98
TV Series
35
Franchise Roles
Clooney
Most Prolific (20 projects)
1994–2025
Span of Careers Tracked
The Show
331
15
Seasons
331
Episodes
1994–2009
Run
Benrubi
Only Actor in Pilot & Finale
48M
Peak Viewers (S1 Finale)
Franchise Stars
10
4
Marvel Cinematic Universe
2
Star Wars
2
DC Universe
1
Spider-Man (Raimi)
1
Kung Fu Panda
After County General
What If
Chris Pine's entire career started with 10 seconds on ER.
His first-ever acting role was a drunk teenager in Season 9. Two years later he was in The Princess Diaries 2. Four years later he was Captain Kirk.
George Clooney's cousin Miguel Ferrer appeared in the pilot.
He played Mr. Parker, a patient diagnosed with terminal lung cancer. Ferrer was already known from Twin Peaks and RoboCop. He tragically died of throat cancer in 2017.
Carol Hathaway was supposed to die in the pilot.
Test audiences loved her so much that producers rewrote the ending. She stayed for six seasons, won an Emmy, and went on to star in The Good Wife.
Leslie Bibb's character was going to be killed in a car accident.
The writers changed their minds. She went on to Iron Man, Trick 'r Treat, The White Lotus, and one of the most prolific post-ER careers.
Ewan McGregor appeared on ER the same year Trainspotting made him a global star.
His Season 1 guest role came right before he became Obi-Wan Kenobi.
Kirsten Dunst was 13 when she guest-starred on ER.
Already known from Interview with the Vampire, she'd go on to Spider-Man, Fargo, and a Cannes Best Actress win.
Lucy Knight's death was one of the most shocking moments in TV history.
Stabbed by a psychiatric patient in "All in the Family," the episode drew 33 million viewers.
Abraham Benrubi's Jerry was the heart of the waiting room.
The gentle giant desk clerk appeared across all 15 seasons, one of the show's most consistent and beloved presences.
George Clooney almost quit acting before ER.
After years of failed pilots, ER was his last shot. Five seasons later he left for Ocean's Eleven, Syriana, and two Oscars.
Don Cheadle's one-episode guest role led to an MCU career.
His ER appearance caught eyes that eventually cast him as War Machine in the Iron Man franchise.
Shia LaBeouf was 14 when he appeared on ER.
Three years later he was starring in Transformers. His ER guest spot came during his Even Stevens era.
Ming-Na Wen went from County General to the MCU.
After three seasons as Dr. Chen, she became Mulan, Agent May in Agents of S.H.I.E.L.D., and Fennec Shand in The Mandalorian.
Angela Bassett ran the ER as Dr. Cate Banfield.
Already an Oscar nominee for What's Love Got to Do with It, she joined Season 15 as chief of the ER. Then became Queen Ramonda in Black Panther.
Chadwick Boseman's brief ER appearance came a decade before Black Panther.
His guest role was a footnote. His legacy as T'Challa was a cultural earthquake.
Noah Wyle was 23 when he became Dr. Carter — and stayed for 12 seasons.
The longest-running cast member went on to star in Falling Skies and The Librarians, becoming a sci-fi franchise lead.
Lucy Liu guest-starred before becoming one of Charlie's Angels.
Her ER appearance was a stepping stone to Ally McBeal, Kill Bill, and Elementary.
Stanley Tucci guest-starred on ER before his biggest roles.
He went on to The Devil Wears Prada, The Hunger Games, The Lovely Bones (Oscar nom), and became a food and travel icon.
Test Your Knowledge
Life After ER
Methodology

We can't get enough of The Pitt, so we went back and binged ER from the beginning again! It's amazing to see all of the people that passed through County General!!

This project tracks main cast, recurring players, and notable guest stars who appeared on NBC's ER between 1994 and 2009, and maps what they did next.

Filmography data was compiled from The Movie Database (TMDB) and cross-referenced with public sources. Each person's projects were selected for cultural significance, box office impact, and critical recognition. Poster images are sourced from TMDB's public image API.

ER character images are sourced from publicly available promotional stills and fan archives. Season and episode data comes from the ER Wiki and NBC archives.

The statistics, Oscar and Emmy counts, combined box office are estimates based on publicly reported figures and may not reflect exact totals. The $32B+ combined box office figure includes worldwide gross of major franchise films featuring cast members in any role.

Post-ER connections between cast members were identified by cross-referencing filmographies for shared projects after their time on ER.

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