Composers Marc Shaiman and Scott Wittman will celebrate the release of the cast recording for “Bombshell,” the musical at the center of “Smash,” with an autograph signing Wednesday at the NBC Experience Store in Manhattan.

The Shaiman-Wittman meet-and-greet begins at 5:30 p.m. at the Rockefeller Plaza store.

Playbill.com has the entire track list for the recording, which includes original songs by the Tony- and Grammy-winning pair (“Hairspray,” “Catch Me If You Can”), along with liner notes detailing the “Bombshell” plot.

Megan Hilty, Katharine McPhee and most of the "Smash" regulars are featured on the recording, which spans both seasons of the series. A bonus CD available at Target includes songs from Christine Ebersole and Jane Krakowski.

The NBC/Columbia Records release drops Tuesday.