Deborah Kerr, about a kissing scene in The Hucksters (1947):
“Both on and off the screen, I was supposed to be this very reserved girl, and the scene was to have double impact because I had to do most of the kissing. Everyone was certain that I wouldn’t know what to do. To complicate matters, my husband, whom I ordinarily can’t drag to a set, was there. Not to see me, but his old war buddy, Mr. Gable.
Well, I knew what to do, and I showed them! But all Tony said to Clark was, ‘Watch it man, watch it!’”
(text from deborahkerr.es)