NEW YORK — If Jimmy Fallon is nervous about the premiere of his new gig as "Late Night" host, he'll have show-biz heavyweights Robert De Niro and Van Morrison to lean on. They'll be the guests for Fallon's March 2 debut hosting the NBC late-night show.
Fallon replaces Conan O'Brien, who has his final show Friday before heading out west to take over the "Tonight" show in June.
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