The country music superstars marked their special day with an adorable throwback photo of the couple on Instagram.
"Happy anniversary baby!!" McGraw, 52, wrote alongside a photo from the 1997 American Music Awards. The couple welcomed their daughter, Gracie, now 22, shortly after the awards show.
"23 years and I can’t wait for the next 50!!!" he shared. "I love u."
He shared a follow-up photo of the duo holding each other's backsides, writing: "Another pic for our anniversary......just for fun :)"
Hill, 52, shared her own celebratory post on the social media site.
"To my one and only, Happy Anniversary, my love," she captioned a different throwback photo. "Love you."
McGraw and Hill tied the knot in 1996. They share three daughters: Gracie, 22, Maggie, 21, and Audrey, 17.