Billy Wilder cast several non-professionals in supporting roles. Guidarino Guidi was a Rome actor's agent who called Wilder about getting jobs on the film for various clients and was instead cast as the maitre d' of the Excelsior Hotel; Raffaele Mottola was hired as the film's dialogue coach and then persuaded to play the passport official at the start of the film; and the elderly Armando Giovagnoli, playing the nonagenarian Baron, was Wilder's chauffeur on the film. The famous make-up man Harry Ray, who worked on a number of Wilder films (and was, for a time, Jack Lemmon's personal make-up man), was cast as Dr. Fleischman, the dentist on Wendell's plane - perhaps because of his close resemblance to Billy Wilder.
