Revealing the engagement news was PEOPLE. One of the sources told the publication, "He proposed in Hawaii a while ago... It was very intimate and the couple has kept it very private."
Zac and Kelly have rarely shared photos or videos of the two together. Though so, the stuntwoman has been accompanying the musician on tour dating back to at least July, when she could be seen in an Instagram video celebrating the singer's birthday on the road.
In the footage, in which Zac Brown Band members sang "Happy Birthday" to the 44-year-old, Kelly was spotted wearing what appeared to be an engagement ring on her finger. She was also seen snuggling into his neck.
In her website, Kelly described herself as an "adventurer, events producer, SAG-AFTRA actress, stuntwoman, and professional model." The Minnesota native also considers herself a "spokesmodel for living with passion" as a motorcyclist.
According to IMBD, Kelly appeared in a music video for Katy Perry's "Harleys in Hawaii". Her TV credits include "Hawaii Five-O" and "Broken Skull Ranch Challenge", while on the big screen, she appeared "The Martial Arts Kid" and documentary "Herb Ritts: L.A. Style".
It was unclear whether Kelly was married before being an item with Zac, but this will be his second marriage. The Grammy winner and his wife Shelly, who share five children together ended their 12-year marriage back in 2018.