"The picture was Brennan's, but it was no good to him if Cooper, his co-star, did not hold his own. It was characteristic of Walter Brennan to want Cooper not only to be happy making the picture, but also to feel that the two of them had something in common--in this case, their servitude to Sam Goldwyn. Employing his powerful gift for mimicry, Brennan called Cooper and, in Goldwyn's voice, said, "You're so lousy I want Brennan to have top billing in this picture." Sooner or later Brennan broke down and cackled over the irate Cooper's responses, and Cooper laughed, too. The point Brennan always made to his fellow actors was--as he had learned during his years as an extra--that they were all in the business together."