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 says that in her 20s, she discovered that the man who raised her was not her biological father — but she has no regrets: 'I grew up where I was supposed to.'

Mariska Hargitay revealed a decades-long secret about her biological father in her new documentary. The “Law & Order: Special Victims Unit” star is the daughter of the late Jayne Mansfield and Mickey Hargitay.