Olivia Wilde has admitted that she trained hard for Tron: Legacy.
The actress stars alongside Jeff Bridges and Garrett Hedlund in the movie, which comes eighteen years after the original.
Wilde reveals that she worked with a personal trainer in the run up to the movie as she got in shape for her role.
Speaking to Women's Health the actress said: "I worked with a personal trainer, so I did about an hour of cardio five or six days a week.
"Weight training three times a week, mixed martial arts/fighting three times a week, and that's a lot more than my normal [routine]!"
The movie has opened at the top of the U.S. box office, beating The Chronicles of Narnia: Voyage of the Dawn Treader to the number one spot.
Wilde has already completed work on Butter and Jon Favreau's Cowboys and Aliens, which sees her star alongside Daniel Craig and Harrison Ford.
Tron: Legacy is out now.
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