It's almost time for a very special delivery! Jason Aldean's wife Brittany showed off her burgeoning baby bump in an Instagram post on Thursday (Sept. 28), giving belly-watchers an eyeful in tight-fitting gym clothes. She's 30 weeks along, according to her caption on the photo.

That means the Aldeans will welcome their son, whom they are naming Memphis, around December 7. It will be the first baby for Brittany. Jason is already a seasoned father of two — but they're both daughters.

Country's Best Bumps Right Here!

This will be his first boy, and he can’t wait to get a little extra testosterone in the house.

“Hunt, fish, playing baseball in the yard and all that kind of stuff, I’m looking forward to all of it,” the star says.

Aldean has a Top 5 hit right now with "They Don't Know," the fourth single from a 2016 album of the same name. He's also on the road through October and has a 2018 stop booked at WE Fest in Detroit Lakes, Minn.

The Coolest Baby Names in Country Music

Jason Aldean's Baby's Name? These Stars Had Suggestions