Question: how old are the pretty little liars in season 1?
Answer: Hannah Marin was about 16 years old during the pilot episode of "Pretty Little Liars" in 2010. However, actress Ashley Benson was 20 years old when she first appeared as the glamorous queen bee. Marin is said to be approximately 23 at the show's conclusion, whereas Benson was 27 years old in real life.