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

My Mom Jayne,' which marks Mariska Hargitay's feature film directorial debut, premiered at the Cannes Film Festival on May 17. In the documentary, the actress reveals a shocking family secret she's kept for more than 30 years.