Mariska Hargitay is sharing a family secret—she is not biologically a Hargitay.

The 61-year-old revealed her late dad Mickey Hargitay, who raised her after her mom Jayne Mansfield died in a 1967 car accident that the Law & Order: SVU actress survived as a child, is not her biological father. That would be Brazilian-born Italian singer Nelson Sardelli, 90. When Mariska was 30, she watched him perform in Atlantic City and then introduced herself. In character.