When Clooney and Wyle weren’t saving lives at Cook County General Hospital as Dr. Doug Ross and medical student John Carter ...

The actor looks back on his time playing Dr. John Carter on the NBC medical drama and his crossover with 'Friends' ...

Even though ER is credited as George Clooney’s breakout role ... he departed the medical drama for Hollywood, Clooney and his ER co-star Noah Wyle reunited for Fail Safe, a made-for-TV film ...

From left: Jennifer Aniston, Courteney Cox, George Clooney and Noah Wyle on 'Friends' in 1996 ...

During the early days of Noah Wyle's time on ER, he and costar George Clooney also guest-starred in an episode of Friends, making for a very cheeky crossover for the two popular NBC shows.

Noah Wyle‘s newest medical drama The Pitt feels ... Wyle starred alongside George Clooney, Julianna Marguiles, Anthony Edwards, Eriq La Salle and Sherry Stringfield (and later John Stamos ...

When it comes to notable actors, it's fair to say George Clooney is up there ... a televised play was developed which starred Clooney, Richard Dreyfuss and Noah Wyle and was broadcast live on ...