Cast the Expert: Judge Weaver was played by Joseph N. Welch, a real-life lawyer who had represented the U.S. Army in the televised Army-McCarthy hearings in 1954.note He was the one who famously asked Joseph McCarthy if he "ha(d) no sense of decency". Welch joked that he took the role because "it looked like that was the only way I'd ever get to be a judge".
Lana Turner was originally offered the role of Laura Manion. She agreed to take it on the condition that she would wear gowns designed exclusively by her personal couturier, Jean Louis. When Otto Preminger objected that such gowns were not suitable for the role, Turner turned down the part. Columbia was ready to give in to Turner's demands but Preminger resisted and gave the role to Lee Remick, then almost a beginner.