Tim McGraw turned to social media on Friday (Sept. 21) to share a series of adorable pictures of his wife, Faith Hill, to mark her 51st birthday.

In the first picture above, young Faith is seated in a '70s-style upholstered chair and holding a full-sized guitar that looks enormous in comparison to her tiny frame. She has her hair up in pigtails, and her face is lit up with joy.

Scroll through the photos to see additional pictures of the singer as a baseball-playing teen, her and McGraw early in their relationship and another of Hill with their children. McGraw is clearly celebrating a life well-lived, and he adds a sweet sentiment to accompany the pictures.

See More Pictures of Faith Hill Through the Years

"From the first time we met, I knew (she didn’t!) that she was the love of my life forever.... no matter the ups and downs, the happy and sad or the good and bad," He writes. "She’s so special and so loved by us. Happy birthday my love. When I wake up next to you in our 80’s... I’ll smile at the life we’ve built."

McGraw and Hill married on Oct. 6, 1996, and they welcomed their first child, Gracie Catherine McGraw, on May 5, 1997. Maggie Elizabeth followed in 1998, and Audrey Caroline was born in 2001.

You Think You Know Tim McGraw?

Relationship Goals: Tim and Faith's Best Pics Through the Years

More From KXRB