'True Detective': Mamie Gummer Joins Season 3 Cast
By Alex Ungerman
Dimitrios Kambouris/Getty Images
Big news for Mamie Gummer!
Meryl Streep's daughter has been cast in a recurring role for True Detective season three. Gummer will play Lucy Purcell, a mother of two in the latest installment of HBO's drama anthology series, which takes us to the American Ozarks for a crime and mystery that plays out over three decades, like a sort of macabre, twisted This Is Us. Season three will star Oscar winner Mahershala Ali, who plays Arkansas state police detective Wayne Hays.