Court records show former "My Name is Earl" co-star entered the plea through her attorney Friday.
Prosecutors in the city of Santa Monica charged Pressly with driving under the influence and having a blood alcohol content of more .20 on Wednesday.
Pressly was arrested Jan. 5 after police say she was stopped for a traffic violation. She was released after posting $15,000 bail.
Records show a judge also ordered the 33-year-old model-actress to attend Alcoholics Anonymous meetings at least twice a week.
The office of her attorney, Richard Hutton, confirmed the plea and that the case will be called again on March 18.