My Mom Jayne,' which marks Mariska Hargitay's feature film directorial debut, premiered at the Cannes Film Festival. In the documentary, the actress reveals a shocking family secret she's kept for more than 30 years.

Mariska Hargitay revealed a decades-long secret about her biological father's identity in a new documentary called "My Mom Jayne."

Mariska Hargitay revealed in a new documentary that her biological father is not Mickey Hargitay, the man who raised her, but rather singer Nelson Sardelli.