Near the end of the film, Karl Malden is embracing Vivien Leigh. In one shot she has her left forearm against his chest, with her hand in the vicinity of his shoulder. In the next shot this arm is instantly around his neck.
In 1951, the time of the movie being shot, New Orleans no longer had streetcars, but the tracks were still there. The movie studio obtained special permission to use the streetcar named desire for Blanch's opening scene.