We all fell in love with Dennis The Menace back in 1993, but we kinda forgot about Dennis… until now!

Believe it or not, but Dennis, AKA Mason Gamble is now 30-years-old!

After beating out 20,000 other child actors to play Dennis The Menace, Mason went on to star in other films such as Rushmore and Arlington Road and had appearances on ER and CSI: Miami.

He also took time out of acting to focus on school and he studied dentistry and marine biology at university!

We think it's pretty safe to say he is all grown up.