Burt Lancaster delivers a strong performance as the fast-talking, appealing salesman who encounters "Sister Sharon" (Jean Simmons) and her thriving ministry. She fervently spreads God’s message, something that doesn't necessarily align with his beliefs, but which he recognizes has a powerful effect on the large crowds attending her services – people who are also incredibly generous with their donations. Initially doubtful, Sister Sharon misjudges his appeal and persistence. He, in turn, makes some assumptions of his own, and they soon become an effective pair when it comes to raising money. However, he’s not without his enemies, including "Lulu" (Shirley Jones), a former lover who is envious of his success and happiness and sets out to destroy it. The central question becomes whether “Gantry” has genuinely transformed or if his newfound piety is merely an act. There's considerable chemistry between Simmons and a very believable Lancaster, blending religion, fondness, and subtle humor as they engage in a game of wits that feels destined for a particular outcome. The dialogue is sharp and engaging, allowing Lancaster, Simmons, Arthur Kennedy, and Dean Jagger to contribute significantly to this story about influence – but who is doing the influencing, and toward what end? I recall a Church of Scotland minister from my youth whose preaching style seemed overly strict; I imagine he might have taken inspiration from this film.

Source on TMDB