Margot Robbie looks unrecognisable as Tonya Harding in biopic I, Tonya

She's presumably wearing a fat suit and facial prosthetics

Margot Robbie rose to fame starring alongside Leonardo DiCaprio in The Wolf of Wall Street (Getty Images)

Actors often go through huge transformations to get into character, one recent example being Matthew McConaughey, who put on weight and went bald for Gold.

Now, Margot Robbie, who looked batsh*t crazy in Suicide Squad, has completely transformed once more for her latest role as infamous ice skater Tonya Harding for the biopic I, Tonya.

The first pictures of Robbie show the actor wearing blue jeans, blue jumper, and frizzy wig, along with donning facial prosthetics and what looks like a fat suit.

And here's the real Tonya Harding (left) for comparison.

Robbie will also act as producer on I, Tonya, which tells the true tale of Harding’s rise through competitive skating and the eventual attack on rival Nancy Kerrigan, orchestrated by herself and husband Jeff Gillooly, who will be played by Captain America’s Sebastian Stan.

Late last year, the name and director of Robbie’s Harley Quinn spin-off was revealed: David Ayer will be helming the upcoming film Gotham City Sirens.

I, Tonya is expected to reach cinemas in 2018, with filming having only started earlier this month.