Law & Order: Svu star Mariska Hargitay is making her feature directing debut with a very personal subject: her mother, Jayne Mansfield.

HBO will premiere Hargitay’s documentary My Mom Jayne in June. The film will follow her “as she seeks to know, understand, and embrace her mother for the first time,” according to the documentary’s logline. “Through intimate interviews and a collection of never-before-seen photos and home movies, she grapples with her mother’s public and private legacy and discovers the layers and depth of who Jayne was, not only to her audience but to those who were closest to her.”

Hargitay is the daughter of Mansfield, an actress and sex symbol of the 1950s and ‘60s, and actor and bodybuilder Mickey Hargitay. Mansfield died in a 1967 car accident, when Hargitay was 3 years old; she was involved in the accident as well but survived, as did two older siblings.