With NBC setting Peter Pan as follow-up to its hugely successful live musical The Sound Of Music, speculation has been rampant who would play the boy that never grows up.  In announcing the title and Peter Pan Live‘s premiere date, Dec. 4, NBC boss Bob Greenblatt wouldn’t elaborate on who will follow The Sound Of Music star Carrie Underwood as headliner of Peter Pan, other than to dismiss rumored names like Miley Cyrus, Justin Bieber or Taylor Swift. Cue airborne Bill Murray singing his heart out in a all-out performance of I’m Flying on tonight’s Late Show With David Letterman. His message to NBC casting execs: “I’m the guy.”