Among Cecil B. DeMille's most serious candidates for the role of Delilah were Jean Simmons, Lana Turner and Rita Hayworth. In the case of the latter two actresses, their respective studios (MGM and Columbia) refused to loan them to Paramount.
According to the biography "The Presidents and the Preacher," Cecil B. DeMille originally offered the role of Samson to the young Billy Graham, then experiencing his first national fame as an evangelist. Graham turned the offer down flat, telling DeMille that he had no ambitions beyond his calling to preach the Gospel of Jesus Christ. The director told Graham that he'd been certain that the young evangelist would refuse the offer, but that in actually doing so Graham had restored DeMille's faith.
As the huge statue of Dagon toppled in the climax, the flames in the fire within the stature "lean" as the statue leaned, before finally toppling over. This clearly shows the flames were images being manipulated, and was not real fire.
Delilah: [being tormented by the Saran's words that she "cannot undo" her betrayal of Samson, his subsequent blinding, and his bondage of grinding grain in the gristmill]
I can! I can! Round and round, day after day, month after month. He never stops! I'm being crushed like the grain beneath the stone. This night must end sometime. O God of Samson, help me. He said you are everywhere. That you are almighty. Hear me. Give back the light to his eyes. Take my sight for his. O god of Samson... Help me.