Debra Messing, Eric McCormack, Megan Mullally, and Sean Hayes will return to the airwaves this fall as Grace, Will, Karen, and Jack in NBC's upcoming revival of the classic sitcom Will & Grace. In the first trailer for the reboot, the Broadway vets pay tribute to Andrew Lloyd Webber's Sunset Boulevard as they sink right back into their old personas...and realize, once they reenter their TV apartment, that it's as if they never said goodbye.