The agency will rep the Australian icon for her live and acting endeavors.
The pop icon kicked off her latest Las Vegas residency on Dec. 30.
The husband-and-wife Americana mainstays are nominated for vocal duo of the year at the upcoming CMA Awards.
The "Rich Men North of Richmond" chart-topper will be repped by UTA's team in Nashville.
The fast-rising Australian artist signs with UTA for representation in the Americas.
"The business will continue to thrive," says UTA music agent Mike G, "but being conscious of ticket pricing will be instrumental."
Steve Cohen, Rob Gibbs and Arthur Lewis will serve as co-heads in Georgia.
The Grammy-winning singer, actress, producer and television personality has signed with the talent agency for global representation in all areas.
Paul Wachter, the CEO of Main Street Advisors, will be the new board chair at UTA, with Ceci Kurzman also joining the board. Exiting chair Jim Berkus remains "very active" at UTA, a source says.
The singer and former One Direction member is currently at work on his fourth studio album.