by Hannah MarderBuzzFeedBuzzFeed StaffI'm a Senior Staff Writer based in New York City, where I've been covering classic BuzzFeed-style content since 2020. 1. Jason Earles was 29 when he began playing Hannah's teenage brother, Jackson, on Hannah Montana. Miley Cyrus was 13, 16 years younger, despite the two characters only being a few years apart in age. Vivian Zink / DISNEY CHANNEL / courtesy everett collection 2. Keiko Agena was 27 when the first episode of Gilmore Girls aired. Her character, Lane, was 15 or 16. This is in comparison to Alexis Bledel, who started playing Rory at age 19.