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.

The actress says her biological dad is Italian singer Nelson Sardelli, not Mickey Hargitay — something she discovered when she was in her 20s.

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.