Ingrid Bergman and Gregory Peck were both married at the time of production — Bergman to Petter Aron Lindström and Peck to Greta Kukkonen— but they had a brief affair during filming.Their secret relationship became public knowledge when Peck confessed to Brad Darrach of People Magazine in an interview five years after Bergman’s death: “All I can say is that I had a real love for her (Bergman), and I think that’s where I ought to stop…. I was young. She was young. We were involved for weeks in close and intense work.”

Spellbound (1945) Dir. Alfred Hitchcock

The people really aren’t very interesting. I’m sorry but it’s just plain true—after being so social, I don’t feel like myself at all. I’m exhausted all over but particularly the face, which I suppose comes from wearing a horrible fixed grin for so long.
—  Elizabeth Bishop, from a letter to Carley Dawson written c. October 1948