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.

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