Hilary Duff was 13 years old when Lizzie McGuire premiered in 2001, and she was about 13 to 16 during the show’s original run from 2001 to 2004.

Quick Scoop

  • Born: September 28, 1987
  • Lizzie McGuire started in 2001
  • That makes her 13 at the start of the series and a mid-teen by the end of it

She was basically the same age range as the character, which helped the show feel so believable.