Jayne Mansfield welcomed two daughters, Jayne Marie and Mariska and three sons, Mickey Jr., Zoltán and Tony Cimber, before her death in 1967

I couldn’t believe that this truth, this bombshell for me, didn’t ever come to light," says the ‘Law & Order: SVU’ star about going public with her biological father’s identity in an HBO documentary on her mother,

Special Victims Unit" actor created an emotional and revealing documentary about her mother, Jayne Mansfield, who died when Hargitay was just 3 years old.