Entertaining and surprisingly funny given the subject matter, the movie’s also an exquisitely acted affair paced by Chastain (who also produces), turning in a career-best effort as the complex Tammy Faye.

Comes drawn in bold, broad strokes — a fond treatment of a flawed but fascinating American icon whose revelations feel mostly cosmetic in the end.

If Showalter resists a cartoon takedown of Tammy Faye Bakker, he also hasn’t made a very deep look at her life, either.

That blend of tones is not always smoothly handled, but there’s enough heart in its express train of ambition, flaws and fallout to allow its leading lady wide berth for a wonderfully committed, soulful, even sexual turn admirably devoid of caricature.

Chastain and Garfield give performances that are brashly entertaining but also canny and layered, as the characters get caught up in something far bigger than themselves. The Bakkers were hucksters of a grand order, and the film uses their spectacular greedhead soap opera to tell the larger American story of how Christianity got turned into showbiz.