How breakout star Margot Robbie of 'Suicide Squad' and 'Wolf of Wall Street' is taking over Hollywood

Margot Robbie left jaws on the floor after her breakout performance opposite Leonardo DiCaprio in "The Wolf of Wall Street."

Now the Aussie actress, 25, is taking a central role in the upcoming "Suicide Squad" movie as the comic-book character Harley Quinn.

The newest trailer dropped this week and it looks like Harley's origin story will take up a large chunk of screen time - and Robbie has a delightfully unhinged presence.

Robbie also has two other films coming out this year: a live-action Tarzan remake, "The Legend of Tarzan," and comedy "Whisky Tango Foxtrot."

In honor of Robbie's newfound success, we're looking back at how she became a Hollywood star.