Answer
Jeff Gillooly, portrayed by Sebastian Stan in the 2017 biographical drama "I, Tonya," was the ex-husband and accomplice of American figure skater Tonya Harding. He gained notoriety for his involvement in the infamous 1994 attack on Harding's rival, Nancy Kerrigan, which resulted in a scandal that rocked the world of figure skating and led to Harding's ban from the sport.