Grace Kelly deserted Hollywood at 26 to become the bride of a prince. [Dolores] Hart, dubbed “the next Grace Kelly,” deserted Hollywood at 24 to become a bride of Christ.

That stunning spiritual elopement is the subject of an Oscar-nominated documentary called “God Is Bigger Than Elvis,” a rare look behind the walls of the cloistered abbey in rural Connecticut where Hart has lived for half a century. (It will be shown on HBO in April.)

“God was the vehicle,” she said of her odyssey. “He was the bigger Elvis.”