Jason Aldean and Brittany Kerr have a baby on the way

"Been hard to keep this secret," the singer wrote.

— -- Congratulations are in order for Jason Aldean and wife Brittany Kerr.

On Monday, the couple announced on Instagram that Brittany is expecting.

Aldean, 40, shared a photo of himself and Kerr sitting in the kitchen with their dogs. Kerr is wearing a "Baby mama" T-shirt, while he's wearing a "Baby daddy" T-shirt.

"Been hard to keep this secret but we couldnt [sic] be happier to add to our family," he wrote. "This year just gets better and better." He added the hashtag "bunintheoven."

The duo married in March of 2015. Aldean has two daughters from a previous relationship.

Been hard to keep this secret but we couldnt be happier to add to our family. This year just gets better and better. #bunintheoven????

A post shared by Jason Aldean (@jasonaldean) on May 8, 2017 at 3:44pm PDT

"Been hard to keep this secret but we couldnt [sic] be happier to add to our family," he wrote. "This year just gets better and better." He added the hashtag "bunintheoven."

The duo married in March of 2015. Aldean has two daughters from a previous relationship.