Rock A Bye Baby (1958)
Clayton Poole (Jerry Lewis) is a big fan of glamorous movie star Carla Naples (Marilyn Maxwell), a recent widow who gives birth to triplets--a fact she wants kept hush-hush since she's starring as a virgin in a religious epic. So Clayton comes to the rescue by agreeing to be the little bundles' babysitter. And as a job bonus he gets to fall in love with Carla's sweet sister, Sandy (Connie Stevens).