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.

Mariska Hargitay makes her feature film directorial debut with 'My Mom Jayne,' out on HBO Max June 27. In the documentary, Hargitay confronts her brother about his dad's turbulent relationship with their mom,