Margot Robbie

In a career of almost six years, "I, Tonya" has marked the first time that actress Margot Robbie has played the lead. She says she was always hesitant about it. The biographical sports drama "I, Tonya" features Robbie as real-life figure skater Tonya Harding and her connection to the 1994 attack on her rival Nancy Kerrigan. When Robbie landed the role, it was the first time she could call home and say: "Mum, I'm the main part."