MARGOT Robbie has undergone a complete transformation for her role as disgraced US figure skater Tonya Harding.

Filming for the biopic — I, Tonya — kicked off this month and the 26-year-old was spotted on the set baring a striking resemblance to the Olympian.

As well as a frizzy blonde wig and very ‘90s jeans, Robbie appears to have bulked up the top half of her body with flesh-coloured padding for the role.

It was announced last year Robbie would play Tonya Harding in the biopic. Harding was a champion figure skater who is best known for her role in the 1994 scandal, when her main competition at the Olympics, Nancy Kerrigan, was attacked by a man hired by Harding’s husband, Jeff Gillooly, to break her leg at the U.S. national championships.