As Jason Aldean and Brittany Kerr's one-year wedding anniversary approaches, the couple is looking to expand their brood!

"We're talkin' about it," Aldean tells ET. "She’s a lot younger than I am, so I gotta make this happen quick. I don’t want to be the old dad! It's something we definitely want, at least one kid and possibly two, we'll see. It's something we've talked about a lot. Hopefully in the next couple years."

WATCH: Jason Aldean and Brittany Kerr Adorably Celebrate First Month of Marriage on the Red Carpet 

Aldean is already dad to two young girls from his previous marriage, and gushes to ET over spending precious family time with his girls.

"My daughters come over, havin' them over there and all of us in the same house, that's sorta my favorite time," he says.

But when Aldean can't be home, his wife joins him on the road.

"We do everything together," he says. "She's out here all the time, which is great. I don’t have to be gone for three or four days a week and be away from each other."

Aldean is currently out on the We Were Here Tour, along with opening act and fellow Georgia native, Thomas Rhett. As it was announced on Wednesday, the singers have each been tapped to join Tim McGraw, Toby Keith, Brooks & Dunn, A Thousand Horses, Brantley Gilbert, Billy Currington, Lonestar and David Nail in New York City for the FarmBorough Country Festival in June. (Passes go on sale Jan. 29 at 10 a.m. ET.)

WATCH: 'Burning It Down' -- How Jason Aldean Snagged Florida Georgia Line's Sexy Song 

For Aldean, the festival sets are sometimes his favorites.

"I think at the festivals, [the crowd is] a lot rowdier a lot of times," he explained. "A lot of them have been out drinkin' all day, so they're pretty fired up when we get on stage and it makes for some fun scenes in the crowd. You look out in the crowd and you see some crazy stuff goin' on out there, so it's a lot of fun."

Rhett tells ET that he's looking forward to swinging through The Big Apple with his wife, Lauren. "Believe it or not, as many times as my wife and I have been to New York City, she still loves to do the touristy stuff," he says. "Every time we go, she wants to go to the Empire State Building. Every time."

And, yes, that's Rhett's longtime sweetheart in his heartwarming video for "Die a Happy Man."

WATCH: Meet Country Music's Next Superstar -- Thomas Rhett 

"There’s been a couple songs in the past that I’ve written that she’s been like, 'Don’t ever let that go. Don't let anybody cut 'em,' and this was definitely one of 'em," Rhett says. "She had been wanting me to write a sweet song for a long time, kinda something like 'Just to See You Smile' by Tim McGraw.

"Even though the song sounds nothing like that, the sentiment is sorta the same and so I definitely wrote it with her in mind," he continues. "All the lyrics are kinda about us and our marriage and our relationship, so just how personal the song is has been really special to see it do so well on the radio and charts."

As for whether their family could be expanding anytime soon, Rhett plays coy with a shy laugh.

"Maybe. I dunno, it's possible!"

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