Ha Ji Won is known as one of the hardest working actresses in kdramas. She doesn't just take on a role, she does whatever it takes to make the role as realistic as possible, whether that's martial arts training, learning to box or play tennis.

To prepare for one of her roles, the actress spent eight-hour days swimming and lifting weights. For other roles, she obtained scuba diving and motorcycle licenses.

She's also known for working through the injuries she sustains during such physically challenging roles.

And now, in the middle of filming the strenuous 50-episode drama "Empress Ki," Ha Ji Won is getting ready to go to Hollywood.

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