"I'm sorry," Watros told the court after entering her plea.
Click here to see video of Watros inside the courtroom
District Judge James Dannenberg also ordered Watros to submit to 14 hours of counseling. "This is no fun, but you know how much worse it could have been. Get on with your life, and I wish you luck," the judge told Watros.
The night she was busted, Watros' blood alcohol level was just over .10. The legal limit in Hawaii is .08.
Following her court appearance, the star spoke to reporters. "I'm extremely grateful to the people of Hawaii for their love and support," she said. "Thank you."
Click here to watch Watros address reporters after her court appearance
Fellow 'Lost' star Michelle Rodriguez was arrested for drunk driving in Honolulu the same night Watros was busted. Unlike Watros, Rodriguez pleaded not guilty and is scheduled to stand trial on March 30.