Mariska Hargitay and Peter Hermann attended the premiere for 'Vie Privée (A Private Life)' at the 78th annual Cannes Film Festival. See their red carpet looks here!

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To millions of TV viewers, Mariska Hargitay is Olivia Benson, the tough but compassionate NYPD captain who has been tackling crimes for the past 26 years on Law & Order: Special Victims Unit. Away from the cameras, Hargitay channels that same fierce dedication into her real-world role as a powerful advocate for survivors of sexual assault.

Mariska Hargitay was joined by her actor husband Peter Hermann and their three children on the red carpet for her directorial debut 'My Mom Jayne.' Hargitay premiered the emotional documentary, which details her mother's legacy,

The new look is courtesy of hairstylist Chris McMillan, who likely added some temporary extensions for the night. But first, colorist Cassie Cohen ensured Hargitay's color was fresh for the red carpet and complemented her stunning Carolina Herrera gown. Related: 7 Best Root Touch-Ups for Gray Hair, According to Celebrity Hairstylists

The actress says her biological dad is Italian singer Nelson Sardelli, not Mickey Hargitay - something she discovered when she was in her 20s.