Clint Eastwood

The first time he spoke lines to a camera, he blew them. A couple of pictures later he spoke his lines perfectly, but he was buried so deep in a dark scene that he couldn't be seen. Toward the end of his first year as an actor, he had a nice little scene with a major star on a major production, and he found a good-looking pair of glasses that he thought gave him a bit of character. But Rock Hudson thought the same thing when he saw the kid wearing them, and Clint had to surrender his specs to the leading man.