Et usikkert smil Skuespillere og folkene bag
Rossano BrazziLuc Ferrand Joan FontaineFrançoise Ferrand Bradford DillmanBertrand Griot Christine CarèreDominique Vallon Eduard FranzMonsieur Vallon Katherine LockeMadame Vallon Kathryn GivneyMadame Griot Johnny MathisJohnny Mathis Sandy LivingstonCatherine Renate HoyMademoiselle Minot Sheryl DeauvilleContessa at Opera (uncredited) Yvette Mimieux(uncredited) Edit AngoldCook (uncredited) Herman BelmonteClub Patron (uncredited) Gabrille Del ValleSouth American (uncredited) David HoffmanConcierge (uncredited) Hans MoebusClub Patron (uncredited) George NardelliWaiter (uncredited) Murray PollackClub Patron (uncredited) Paul RavelClub Patron (uncredited) Carol van DykeSouth American (uncredited) Judith WoodburyClub Patron (uncredited) Frances GoodrichManuskript Lyle R. WheelerArt Direction Milton KrasnerDirector Of Photography Louis R. LoefflerFilmklipper Alfred NewmanKomponist af original musik 
