The new additions will be joining already announced artists such as Maren Morris and The Avett Brothers.
The vulnerable, heartbroken track's ascent caps off a huge year for the Louisville songsmith.
Alana Springsteen, Morgan Evans, Amanda Shires and more join the 2023 UK festival's line-up.
Morgan Wade, Jackson Dean and Stephen Wilson Jr. have also been confirmed for the first ever instalment of the UK festival.
Zimmerman was recently announced as support for Morgan Wallen's 2023 One Night At A Time world tour.
The ‘God's Country’ star and The Voice USA judge will appear at the Canadian festival on August 6.
