George Clooney reprised the role that made him famous Tuesday night on "Jimmy Kimmel Live!" The actor put on a white doctors coat that he wore during his time as Dr. Doug Ross on "ER." Clooney was the only cast member of the popular medical drama that showed up for Kimmel's reunion, so the actor teamed up with another famous TV doctor, Hugh Laurie's Dr. Gregory House.

"This was kind of a last-minute thing, and we had some trouble getting the whole cast of 'E.R.' to come," Kimmel said. "[Julianna Margulies] was filming The Good Wife, so she couldn't make it. [Noah Wyle] wanted to be here, but guess he had a thing with his family, Taco Tuesday. Eric LaSalle had jury duty."

Instead, out walked Laurie in full character as House complete with cane and accent!

"What year were you on 'ER?'" Clooney asked Laure.

"Well, I was not technically on 'ER,' I was on House," the British actor replied.

"Well, that's close enough," Clooney said.

Kimmel played the part of the sick patient that was examined by Clooney and Laurie and went into organ failure, which prompted the fake doctors to perform CPR on Kimmel.

"Dr. Ross, you remember what they taught us at TV medical school, you have to give him the rapper's delight!" Laurie said.

Clooney then performed CPR as he sung the lyrics from the Sugarhill Gang's 1979 classic song.

"I said a hip hop, the hippie to the hippie, the hip hip a hop, and you don't stop, a rock it, to the bang bang boogie, say up jump the boogie," the Academy-Award winner recited.

Check out the full clip below: