system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do so many movies tend to cast people in their mid-to-late twenties to play as high school kids?
gpt
Underage actors have far more regulations regarding when they can work and how often; those regulations are intended to protect child actors, but it means that it's just easier to work with older actors.

In addition, older actors just have more experience and and are generally more convincing on screen; think about how terrible the acting is on, say, Disney Channel, where most of the actors are actually about the same age as the characters they're portraying, compared to most movies where you have actors in their twenties playing high school kids.