Those Lips, Those Eyes is a 1980 romantic comedy film directed by Michael Pressman, starring Frank Langella, Glynnis OConnor, and Tom Hulce.
Inept at his job, Artie is nearly fired until the star of the show, Harry Crystal, takes a liking to him and takes the kid under his wing. Artie becomes smitten with one of the attractive chorus girls from the show, Ramona, a worldly young woman who provides his sexual initiation. But soon the show must move on to another town, leaving Artie alone with his dreams.
Source: Wikipedia