22 June 2017 Last updated at 17:15 BST
Thousands of people have already pitched up tent at Worthy Farm in the South West of England, where the Glastonbury festival takes place.
This year it runs from 23 -25 June.
It's been happening for more than 40 years and is famous for music, fun and mud!
Here's Leah with all you need to know about this year's Glasto!
It's Glastonbury time!