Justin Timberlake & Jimmy Fallon Arrive for 'SNL 40' Red Carpet!
Jimmy, a former performer at SNL, and Justin, a frequent host on the show, are expected to play a big role in the 3.5 hour live broadcast tonight!
Justin and his former boy band *NSYNC are also reuniting tonight but it is unclear if they will sing or perform in a sketch.
Stick with JustJared.com all night for the best show moments! SNL 40 airs at 8pm EST on NBC.