Here Are 23 Pictures Of The Cast Of "ER" Then Vs. Now

Then: He starred as Dr. Tony Gates in 65 episodes of ER.

Now: He's currently reprising his role as Uncle Jessie in Fuller House.

Then: She starred as Charge Nurse Samantha Taggart in 126 episodes of ER.

Now: Since ER she's starred in numerous TV shows and movies such as Bloodline, Mad Men, and Avengers: Age of Ultron.

Then: He starred as Dr. John Carter in 254 episodes of ER.

Now: He most recently starred in the TV series Falling Skies and The Librarians.

Then: She starred as Nurse Carol Hathaway in 136 episodes of ER.

Now: She most recently starred as Alicia Florrick in The Good Wife from 2009–2016.

Then: He starred as Dr. Luka Kovac in 185 episodes of ER.

Now: He currently stars in the NBC series Timeless.

Then: She starred as Dr. Abby Lockhart in 189 episodes of ER.

Now: She most recently starred in the hit series The Affair.

Then: He starred as Dr. Mark Greene in 182 episodes of ER.

Now: He most recently starred in Law & Order True Crime: The Menendez Murders.

Then: She starred as Dr. Jing-Mei Debra "Deb" Chen in 118 episode of ER.

Now: She stars as Melinda May in Agents of S.H.I.E.L.D.

Then: She was featured in 13 episodes of ER as Cynthia Hooper.

Now: She's currently starring in her 19th season of Law & Order: SVU as Olivia Benson.

Then: He was featured in 31 episodes of ER as Dr. David Morgenstern.

Now: He currently stars as Frank Gallagher in Shameless.

Then: He was featured in 70 episodes of ER as Dr. Ray Barnett.

Now: He most recently starred in the TV series Salem and reunited with his Walk to Remember co-star Mandy Moore in 2017.

Then: She starred as Nurse Chuny Marquez in 219 episodes of ER.

Now: She currently has a recurring role on Shameless.

Then: He starred as Dr. Gregory Pratt in 136 episodes of ER.

Now: He most recently starred in The CW's Frequency.

Then: She starred as Dr. Kerry Weaver in 250 episodes of ER.

Now: She currently stars in the TV series Colony.

Then: She starred as Dr. Neela Rasgotra in 129 episodes of ER.

Now: She most recently guest-starred as Senator Ellen Nadeer in Agents of S.H.I.E.L.D.

Then: He starred as Dr. Peter Benton in 173 episodes of ER.

Now: He most recently starred in the film Logan as Will Munson.

Then: She starred as Dr. Jeanie Boulet in 103 episodes of ER.

Now: She currently has a recurring role in Mr. Robot and will appear in the upcoming Freeform series Cloak & Dagger.

Then: He starred as Dr. Archie Morris in 112 episodes of ER.

Now: He currently stars in The Orville and American Dad!

Then: She starred as Dr. Susan Lewis in 142 episodes of ER.

Now: She most recently starred in Criminal Minds: Beyond Borders.

Then: He starred as Dr. Robert Romano in 126 episodes of ER.

Now: He starred in several episodes of Under the Dome and recently stepped behind the camera to direct episodes of Star, Major Crimes, Shades of Blue, and Grey’s Anatomy.

Then: She starred as Nurse Haleh Adams in 184 episodes of ER.

Now: She most recently guest-starred in several episodes of Orange Is the New Black.

Then: She starred as Dr. Elizabeth Corday in 160 episodes of ER.

Now: After ER she went on to play River Song in Doctor Who. Most recently, she's appeared in Arrow and Gilmore Girls: A Year in the Life.

Then: He starred as Dr. Doug Ross in 109 episodes of ER.

Now: He'll make his return to TV in the upcoming Hulu series Catch-22.