Former Oasis frontman Liam Gallagher is topping the bill along with Scottish rockers Garbage.
The Met Office has forecast good weather for most of the three-day music festival on Glasgow Green.
The festival opens on Friday with Sugababes and Example on the bill.
Saturday is due to be overcast, with acts including Gerry Cinnamon, The Vaccines and Natasha Bedingfield topping the line up.
Sunday’s weather forecast is sunny and the festival will be competing for attention from the Euros final.
Headliner Calvin Harris and electronic music legend Alison Goldfrapp are on the line up.
Here are some of the best pictures so far.
5. TRNSMT Festival 2024
Crowds storm through the gates as the gates open at the Transmt Festival at Glasgow Green Photo: Michael Boyd
6. TRNSMT Festival 2024
Festival goers arrive at TRNSMT Festival 2024 at Glasgow Green Photo: Jeff J Mitchell
7. TRNSMT Festival 2024
Music fans watch Picture This performing at day one of the TRNSMT Festival 2024 at Glasgow Green Photo: Jeff J Mitchell
8. TRNSMT Festival 2024
Fans watch Picture This performing at day one of the TRNSMT Festival 2024 at Glasgow Green Photo: Jeff J Mitchell