20 Things You Didn't Know About Batman & Robin

9. George Clooney Visited The Set Of ER In Full Costume

Batman & Robin
NBC

His five-year stint on ER between 1994 and 1999 turned George Clooney into a household name, setting the actor on the path to movie stardom in one of the most popular shows of the era in a role that saw him earn multiple nominations at both the Golden Globe and Emmy Awards.

The shooting schedule for Batman & Robin was arranged so that Clooney would have enough time to jump between the two projects, but the famous practical joker decided to use that to his advantage when he showed up to the set of ER in full Batman costume to no doubt hilarious results.

They should have just used it for an entire episode, and had none of his co-stars at any point question why Dr. Doug Ross was suddenly patrolling the ward dressed as Batman.

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