The Insider.com

Last night marked a major milestone in Darren Criss' career: opening night on Broadway as he took over for Daniel Radcliffe as J. Pierrepont Finch in the How To Succeed In Business Without Really Trying revival.

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And by all accounts, it was a smashing success!

MORE: Who Makes The Best Finch?

Check out this pic of him getting swarmed, post-show, by fans at the stage door.

And to think, 18 months ago he was begging people to come to his shows...

MORE: Darren Criss Talks His Broadway Debut