Not that it's original source material is a film, and not that its title is fully the same as the classic play it's based on, but perhaps the first marketing of a show with "the musical" added to the title was "Cyrano: the musical!" in 1994 (not to be confused with another musical named, more simply, "Cyrano" (for which, Christopher Plummer won the best actor in a musical Tony) in 1973.
I could be wrong, but I believe titles like "____________ the musical" really took off in 2009 with Billy Elliot and Shrek.
BTW before Gigi (1973) there was Fanny (1954). Both had previous films with the same names covering the same material, though both Broadway musicals were either adapted from or based on material that was adapted from earlier source material, Colette's novella and Pagnol's plays (Fanny and Marius), from the 30s, both of which were filmed in the 30s, and another movie by Pagnol ("Cesar"
also from the 30s.
Another relatively early show using the same title as an original screenplay movie is 1980's Woman of the Year (which opened, I believe, before 42nd Street, also from that season).
Updated On: 5/5/17 at 02:56 PM