What, no castmates?! George Clooney donned Dr. Doug Ross’ white coat for an ER reunion on Jimmy Kimmel Live! on Tuesday, February 2. 

But unfortunately for the happily married actor, he was the only one of his former costars to show up for the get-together.

Having established that Julianna Margulies was too busy filming The Good Wife, Noah Wyle was having Taco Tuesday with his family and Eriq La Salle was on jury duty, a new partner in crime was called in to assist Clooney, 54, in his busy Emergency Room duties.

Cue Hugh Laurie, who walked onto the set with Dr. Gregory House’s walking stick!

"I was not technically on ER, I was on House," the British actor admitted. But that was good enough for Clooney, who went on to engage Laurie, 56, in a discussion on how best to treat their talk-show host patient.

"He's crashing!" Laurie proclaimed, before the pair of them trotted out their best array of medical terminologies!

Clooney proceeded to perform CPR on Kimmel, but Laurie feared their patient's only hope was some “Rapper's Delight."

Check out Clooney's impressive rapping skills (not to mention his dance moves!) in the clip above. 

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