Miley Stewart, a.k.a. Hannah Montana, is portrayed as a teenage girl who is about 14 years old when the show begins, and she ages through her mid‑teens over the four seasons.

Quick Scoop

  • In the very first episode, Hannah Montana is introduced on a TV show as a “14‑year‑old sensation,” placing her around 14 at the start of the series.
  • Within fan timelines that line up in‑show dates with air dates, Miley Stewart is described as being 14 in season 1 and reaching about 17 when she publicly reveals her double life near the end of the series.
  • The character is consistently framed as a teen pop star balancing high school life and fame, which is also how official descriptions talk about the series.

So, in simple terms: Hannah Montana starts off about 14 years old on the show and ends up around 17 by the time her secret is out.

Information gathered from public forums or data available on the internet and portrayed here.