The first time I saw (Actor) was in the movie. ___________

This is a story from my dear 89 year old mother from the 1940s, a crooner appeared in a movie singing a song, and my mother said "he's got something other singers dont" and "He will be a star" and this was before Anhors Aweigh, so it must have been of one of the early RKO movies, offcourse it was Frank Sinatra (who according to my mother was both cute and handsome).