United Kingdom, June 26 -- Mariska Hargitay discovered the truth about her parentage from the head of her late mother's fan club.

The 61-year-old actress - whose mom, actress Jayne Mansfield, was killed in a car accident when she was a baby - recently revealed that she had discovered in her 20s that her dad was actually Italian entertainer Nelson Sardelli, who her mother had dated following a brief split from her spouse, Mickey Hargitay, who Mariska had grown up believing was her biological parent.

And she has now opened up on how the truth was first revealed.

Speaking on the Call Her Daddy podcast, she said: "It was so rough. I had been invited to this guy named Sabin Gray's house, and he was head of the Jayne Mansfield fan club, and ...