Willie Robertson revealed on The Tonight Show on Tuesday that he officiated Aldean and the former American Idol contestant's beach ceremony, Us Weeklyreported.
Robertson told Jimmy Fallon during the show he's been "hired a couple times" to preside over weddings as a minister.
Aldean reportedly picked the reality TV star for the gig because they've been good friends for about eight years. Robertson wore a white shirt, khakis and a bandana around his puffy hair when he officiated the wedding.
"I love the people that were on the beach, and I wonder what they were thinking. Like, 'Where'd you get the homeless guy to do this?' I don't look like a minister," Robertson explained.
Although the Duck Dynasty star may not be someone's typical choice for the job, Aldean told Us that Robertson was his No. 1 pick.
"I wanted it to be someone I was close to and admire," explained the country star, who first met Robertson on a hunting trip with mutual buddies.
"I was honored Jason asked me to be a part of this special ceremony," Robertson told the magazine. "I'm glad to see him tie the knot."