Country superstar Jason Aldean married his fiancee Brittany Kerr in Mexico on Saturday, Mar. 21, the couple exclusively confirm to Us Weekly Credit: Kristy Belcher and Amy Conner

They're just gettin' started! Country superstar Jason Aldean married his fiancee Brittany Kerr on Saturday, Mar. 21, the couple exclusively confirm to Us Weekly. They said "I do" in an evening ceremony in Mexico.

"This is the best day ever — I've got my girl here, my friends, my family — it's the best day ever!" Aldean, 38, tells Us in a statement.

His new bride, Kerr, adds: "Today has been the best day of my life. I feel like the luckiest woman to have been able to marry my best friend."

Aldean and Kerr, 27, were feted by family and friends, including Duck Dynasty star Willie Robertson and Aldean's daughters, Keeley, 12, and Kendyl, 7, from his previous marriage.

Aldean proposed to Kerr in September 2014 after two years of dating. "My man did it again," Kerr wrote via Instagram at the time. "Today was amazing." As Us exclusively reported, they later popped champagne at Nashville's luxe Citizen Club in January to celebrate. Among the 100 guests were fellow country singers Luke Bryan and Eric Church.

For more exclusive details on Aldean and Kerr's wedding, pick up the next issue of Us Weekly, on stands Wednesday.