Four days a week, Jimmy Fallon performs for a TV audience of millions of people as the host of NBC’s “The Tonight Show.” But stepping onto the stage of the Hudson Theater in front of about 1,000 theatergoers made him nervous in a whole new way.

TV star and former SNL regular Jimmy Fallon made his Broadway debut last night, even if it won’t be particularly a long-running gig. Fallon will do six performances of All In: Comedy About Love, Simon Rich’s episodic tales of love that features an ever-evolving cast week after week.