Mariska Hargitay revealed in a new documentary that her biological father is not Mickey Hargitay, the man who raised her, but rather singer Nelson Sardelli.

Mariska Hargitay was 3 years old when her mother, actress Jayne Mansfield, was killed in a car accident in 1967. The mother of five, who was compared to Marilyn Monroe, was 34.

Mariska Hargitay is blowing the lid off a family secret that she’s been holding onto for decades and makes the big reveal in a new documentary focused on her bombshell mother, the late-actress Jayne Mansfield.