Dean Martin on a Vespa with a non-mystery girl

Dean Martin, looking very much like Tony Bennett, rides a Vespa scooter in this undated image supplied by WENN. We are going to make a wild guess and say that the unnamed woman behind him is the actress Anna Maria Alberghetti. (Checks notes online...) Yes! The two of them starred together in a film titled Ten Thousand Bedrooms in 1957. The plot, per Wikipedia: "Millionaire hotel mogul Ray Hunter flies to Rome to buy another property, the Regent. He is picked up at the airport by lovely Maria Martelli, who works for the hotel's owner, the Countess Alzani." If you were in a movie set in Rome in 1957, a Vespa had to be involved. Mystery solved! Alberghetti played not Maria Martelli but her sister, Nina, an 18-year-old who "takes an almost immediate liking to Ray." Alberghetti turned 21 the year the film was released, and Dean Martin turned 40. Oh, Hollywood, never stop being crazy!