It's been 13 years since The Hills first aired on MTV and you better believe the cast has transformed since then. 

Take a look at our favourite cast members and their low-key glow ups in just over a decade. 

Time flies when you're having fun!

- Tait McGregor

Don't miss The Hills: New Beginnings when it premieres on MTV on June 25!

GALLERY: Here's What All Your Faves From The Hills Are Doing Now...