How old was hanna marin in season 1?

In Season 1 of "Pretty Little Liars," Hanna Marin is portrayed as a 16-year-old high school student. The show begins with her and her friends navigating the challenges of adolescence while dealing with the mysteries surrounding their friend Alison's disappearance. Hanna's character undergoes significant development throughout the series, but she starts off as a teenager facing typical high school dilemmas.