While Harris didn’t sing, dance, or perform any signature magic tricks, for the upcoming 100th episode of How I Met Your Mother the Broadway veteran will burst into song as Barney.

“It’s a musical coda — it’s a great representative show,” said Harris. “We wanted to do something that was big yet still in the voice of the show, and our ...  head writers wrote a very hilarious episode that has a great song they wrote that represents Barney well. It’s funny; everyone’s in it. ... There were 80 people and a giant crane. It was epic.”

As far as pairing up with producer Joss Whedon for Dr. Horrible's Sing-Along Blog, the sequel, he said, “Well, Dollhouse is canceled so I think we’re one step closer.”

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