Richard Widmark and James Stewart both wore hairpieces, and they both had hearing problems. At one point during filming John Ford shouted, "Great, so this is what my career has come to - directing two deaf hairpieces!".
This was the last film in which James Stewart wore his familiar cowboy hat. Up to this point he had worn it in all his westerns since Winchester '73 (1950), except Broken Arrow (1950). This was Stewart's first film with John Ford and Ford didn't want him to wear it, as he thought it was the worst looking cowboy hat he had ever seen. As Stewart said in the documentary, A Wonderful Life (1989), Ford relented but got back at Stewart in their next western, The Man Who Shot Liberty Valance (1962), when he didn't let Stewart wear a hat at all.
According to Peter Bogdanovich in "Pieces of Time" Richard Widmark stated he had more fun on this film than any other. "I'm a little deaf in this ear . . . and [John Ford]'s a little deaf in the other, and [James Stewart's hard of hearing in both! . . . So all through the picture, all three of us were goin', "What? What? What?"