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Justin Timberlake to Appear on Jimmy Fallon's First Show

By Mark Dagostino

Wednesday February 25, 2009 02:00 PM EST

Justin Timberlake

Theo Wargo/WireImage

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Jimmy Fallon reached into his Saturday Night Live pocket and pulled out a big trick: Music superstar Justin Timberlake will be a guest on Fallon's very first Late Night show, PEOPLE has learned exclusively.

Fallon, the former SNL star who's taking the reigns of NBC's talk show from Conan O'Brien beginning March 2, famously costarred with Timberlake in the classic SNL skit, "The Barry Gibbs Talk Show."

Fallon previously announced another guest for his debut behind the desk: Robert DeNiro. "I thought it would be kind of good to have my first guy be probably one of the toughest people you could interview," Fallon said during a Feb. 19 phone call with press.

PEOPLE has also confirmed that Fallon booked music act Clap Your Hands Say Yeah for his March 4 show, and Gossip Girl hottie Chace Crawford for March 6.

Timberlake's rep could not be reached for comment.