I knew almost nothing about Tonya Harding, the American figure skater who was involved in a national sports scandal back in the 90’s. So it was up to Margot Robbie to give me a reason to care. To say that she succeeds with flying colors would be an understatement. Robbie is simply sensational, as she delivers a fearless and sympathetic portrayal of a young figure skater who rose to fame in the early 90’s, before she found herself being led into dark places by the people around her. Screenwriter Steven Rogers and director Craig Gillespie employ a dark/funny structure, beginning their film with a montage of interviews with the characters in the story, then showing how Tonya began her turbulent journey with her mother (a terrific Allison Janney), and later on with her husband, played by Sebastian Stan. The 1980’s and 1990’s recreation is remarkably good, from the costumes to the details of the Olympic atmosphere. The movie also benefits from a kick-ass soundtrack that will surely satisfy fans of classic rock. There are no weak links in the cast, as everyone gets the chance to shine. Still, this is Margot Robbie’s show all the way, and she brings her character to life with terrific skill, leaving us with much to think about. This, and a dose of humor, make “I, Tonya” a must-see biopic.