The special livestream, which featured several of the show’s stars coming together for a virtual chat and a fan Q&A, was the brainchild of onetime ER star GloriaReuben, who now balances her time between acting (most recently in Showtime’s City on a Hill) and activism, as she’s also Waterkeeper Alliance’s president. The nonprofit organization is the world’s largest dedicated to clean water and helps educate grassroots leaders worldwide about this important issue. “I am absolutely thrilled to be reuniting with my ER family for a cause that is so close to my heart,” Reuben—who reached out to her former co-stars to ask them to participate—said in a statement. The virtual event will be hosted by StarsInTheHouse.com, an online fundraising platform that has brought in donations for important causes by reuniting the casts of such beloved movies and shows like Cagney and Lacey, thirtysomething, Little House on the Prairie and more. Here are all the details you need to watch the ER reunion.

How to watch the ER reunion special to benefit the Waterkeeper Alliance

The reunion was live-streamed Thursday, April 22 (aka Earth Day) at 8 p.m. ET at StarsInTheHouse.com and on the Stars in the HouseYouTube channel. It was also available on People’s Facebook, Twitter and YouTube pages, as well as on PeopleTV’s Facebook and Twitter accounts. You can now watch it on YouTube

Which ER cast members returned for the reunion?

ER was renowned for featuring a rotating cast of main and supporting characters throughout its 15-season run, and the special featured regulars from Season 1 on through. They include O.G. stars Clooney (who played pediatric specialist Doug Ross), NoahWyle (who played med student-turned resident John Carter), AnthonyEdwards (Dr. Mark Greene), CCH Pounder (Dr. Angela Hicks) and Julianna Margulies (RN Carol Hathaway). Other performers slated to appear on the special include Laura Innes (Kerry Weaver), Ming-Na Wen (Jing-Mei Chen), Goran Visnjic (Luka Kovac), Alex Kingston (Elizabeth Corday), PaulMcCrane (Robert Romano), Laura Cerón (Chuny Marquez), YvetteFreeman (Haleh Adams) and Conni Marie Brazelton (Connie Oligario). Reuben, who played HIV-positive physician assistant Jeanie Boulet, of course participated as well.

Who else appeared on the ER reunion?

Stars in the House producers and cohosts SethRudetsky and JamesWesley were on hand to help facilitate the cast discussion and moderate questions submitted live by fans. 

Has the cast of ER ever reunited before?

Not really! Toward the end of the drama’s run on NBC, several erstwhile cast members returned to reprise their roles, such as when Clooney and Margulies popped up in a Season 15 scene with Linda Cardellini (Samantha Taggart) and Parminder Nagra (Neela Rasgotra).

How long was ER on TV?

ER debuted September 19, 1994, on NBC and ran for 15 seasons (a whopping 331 episodes!) before its finale aired April 2, 2009. Fun fact: It held the record as the longest-running medical drama in TV history until 2019, when it was surpassed by Grey’sAnatomy.

How to binge-watch ER before the reunion

All 15 seasons of ER are available to stream on Hulu with a premium subscription. Looking for a good reboot? Get the latest tea on the Gossip Girl reboot. 

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