(Photo Credit: Manhattan Modern Luxury)

She may be just 23 years old, but Margot Robbie isn't backing down for anyone - not even Leonardo DiCaprio.

The "Wolf of Wall Street" actress said she shocked the movie star when she took charge during a sex scene the couple had to shoot.

"We were positioned while they lit around us in one scene, and I kind of pushed Leo's head to one side and told him he was in my light and he moved out of [it]," she told Manhattan magazine for its latest issue.

Read: 'The Wolf of Wall Street' Movie Review

This was behavior DiCaprio, 39, was not used to, especially from a young actress.

"He was so incredulous that I had told him to get out of my light, and physically moved him out of the way, he was like, 'Did you really just do that?'" she said. "I don't think anyone has told him to get out of their light in quite some time. He seemed extremely [shocked], but it was kind of funny."

Sex scenes aside, Robbie said working with DiCaprio was "a dream come true."

"Working with Leo challenged me every single second - the challenge just to keep up with him pushed me and got my acting to a level it's never been, which is incredibly satisfying," she said.

Related: Margot Robbie Speaks Out About Will Smith Cheating Rumors

Robbie added that she keeps "getting lucky with my co-stars" and she's not kidding. In addition to "Wolf," she also has "Focus" coming out in 2014 opposite Will Smith.

"You know, Will is really wonderful," she said. "We do one take that's hilarious … and the very next take it's really emotional and sad, and people are crying. It's fun - we get to play with different levels all the time. He has the capacity to do both comedy and really serious drama, so there are endless possibilities."