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 reveals her dad, Mickey, was not her biological father in an interview with 'Vanity Fair.' The 'Law & Order' actress will dive into the family secret in her upcoming documentary, 'My Mom Jayne,