Scenes were filmed on location in Paris. During principal photography, Perkins thought Bergman was a "little too persistent" in her attempts to get him to rehearse their kissing scenes; Perkins later said "Bergman would have welcomed an affair with him", but Bergman had a different explanation in her 1980 autobiography, saying it was her shyness and tendency to blush: "You see, although the camera has no terrors at all for me, I'm very bad at this sort of intimacy on the screen, especially when the men are practically strangers."