Willa Gray Akin is growing up so fast!
"Ok I'm really sorry for all the posts today but we went straight from Halloween to Willa Grays's 5th birthday," the "Be a Light" singer wrote. "WG you continue to amaze me with your heart, your kindness, your selflessness, and your hilariousness. You make me such a better human being, and I'm inspired by you every single day. You may be 5 but you already act like your 15."
He continued, "You are the MOST amazing big sister that AJ and Lennon could ask for. I can't wait to watch you grow and be there with you every step of the way. To my beautiful baby girl, happy birthday sweet pea."
In May 2017, as fans may recall, the couple officially adopted Willa from Uganda at 18 months old, after a year-long process. Thomas Rhett and Lauren spoke to People at the time about the rewarding experience.
Lauren added, "It felt like a dream. I've dreamed of us being on the same continent for so long. It finally feels like everyone is where they're supposed to be." Thomas Rhett also took to Twitter to share his excitement of Willa being with the family.
"Meet Willa Gray Akins! I can't believe our daughter is finally home [raising both hands in celebration emoji]," read the tweet. "Thank you to everyone who prayed every single day for this sweet girl."
The pair also share two other daughters, Lennon Love Akins, 8 months, and Ada James Akins, 3.
My, how time flies.