The Pretty Little Liars actress revealed that she used to starve herself, but insisted that she has since developed healthier habits.
"I've never really talked about this, but I would go days without eating. Or maybe I'd have some fruit and then go to the gym for three hours," Hale explained to Cosmopolitan.
"I knew I had a problem. It was a gradual process but I changed myself."
In June, Hale announced plans to record her first country album and will work with Sugarland's Kristian Bush on the recording.
Hale has expressed interest in starring in the upcoming film adaptation of Fifty Shades of Grey, saying: 'I'm ready for something risky'.