Elmer Gantry (1960)

When hedonistic but charming con man Elmer Gantry meets the beautiful Sister Sharon Falconer, a roadside revivalist, he feigns piousness to join her act as a passionate preacher. The two make a successful onstage pair, and their chemistry extends to romance. But both the show and their relationship are threatened when one of Gantry's ex-lovers decides that she must settle a score with the charismatic performer.