Before I review this Jerry Lewis movie, let me just mention a couple of players from previous films he made with Dean Martin: Hans Conried plays his boss, Mr. Wright, and Mary Treen plays a nurse. Okay, with that out of the way, I'll just say this was quite a change of pace for Lewis since for one thing, there's no role that would have been played by Martin since Jer is truly the whole show here. Also, with him having to take care of babies that happen to be sired by former girlfriend Carla Naples (Marilyn Maxwell), his shtick is not-so-frantic when he's on screen with them. Helping him is Carla's father (Salvatore Baccaloni) and her sister Sandy (Connie Stevens) who has a crush on Clayton Poole (Jer's character). Oh, and Carla's a movie star so there's also an agent (Reginald Gardiner) on hand. And one more thing: Jerry sings some good songs, including a duet with Mr. Baccaloni, in his own normal voice and he's as good as Dean would have been if he warbled them. He also sings with his son Gary, who's underage here and years from his fame with the Playboys, in a sequence mixing present with flashback as Gary plays his father when his age. Reportedly, Jerry's father Danny also appears though I didn't recognize anyone with the family resemblance. No matter as for the most part, I really enjoyed this movie except whenever Lewis did a couple of Asian gibberish that fell in the stereotypical trap. Oh, and Connie was also lovely when she sang. Okay, I've said enough so on that note, I highly recommend Rock-a-Bye Baby. Kudos to writer/director Frank Tashlin too. One more thing, you'll be amazed when you see the picture of the bullfighter Carla was married to when she had her triplets!