Her mother was Loretta Young. Her father was Clark Gable.

Yet Judy Lewis spent her first 19 months in hideaways and orphanages, and the rest of her early life untangling a web of lies spun by a young mother hungry for stardom but unwilling to end her unwed pregnancy.

Loretta Young’s deception was contrived to protect her budding movie career and the box-office power of the matinee idol Gable, who was married to someone else when they conceived their child in snowed-in Washington State. They were on location, shooting the 1935 film “The Call of the Wild,” fictional lovers in front of the camera and actual lovers outside its range.

Ms. Lewis, a former actress who died on Friday at the age of 76, was 31 before she discerned the scope of the falsehoods that cast her, a daughter of Hollywood royalty, into what she later described as a Cinderella-like childhood. Confronted by Ms. Lewis, Young finally made a tearful confession in 1966 at her sprawling home in Palm Springs, Calif.

Young was 22 and unmarried when she and Gable, 34 and married to Maria Langham, had their brief affair. She spent most of her pregnancy in Europe to avoid Hollywood gossip. Ms. Lewis was born on Nov. 6, 1935, in a rented house in Venice, Calif. Soon she was turned over to a series of caretakers, including St. Elizabeth’s Infants Hospital in San Francisco, so that Young could return to stardom.