The event will begin with a parade at 1 p.m. Activities in the park will start at 1:30 p.m. and continue throughout the day, ending with fireworks after dark.
Activities will begin at 1 p.m. and will include creative games, snacks and a chance to view award-winning poetry by young writers from across Hattiesburg.
The event will feature nature-themed activities such as a petting zoo, a live raptor show, a native plant sale, food trucks and kayaking tours for all skill levels.
This is the second year of the revamped fair after organizers switched partnerships to North American Midway Entertainment, the largest amusement ride supplier in North America.
The show marks the first paid concert event hosted at the theater since its opening in December. The theater was the first of three projects funded by grants from the Mississippi Outdoor Stewardship Fund.