Mariska Hargitay has been making headlines after the revelation about her biological father, Nelson Sardelli, during the premiere of her deeply personal documentary, My Mom Jayne.

Mariska Hargitay’s fans believed she was the daughter of Hollywood icons Jayne Mansfield and Mickey Hargitay. However, in May 2025, the Law & Order: Special Victims Unit actress revealed a major family secret – sharing that her biological father is actually 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.