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.

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 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.