The Grammy-winning country duo showed off some serious PDA at the 2014 CMA Festival in Nashville last week, and now McGraw is opening up about his leading lady in his most recent interview.
During the June 6 episode of Oprah's Master Class, the 47-year-old became emotional when speaking about the love of his life.
"The chances that we've gotten to tour together, sing together, I mean, how many people get to do that in their lives?"
He added that Hill forces him to be his best self, especially when they're sharing the spotlight.
"You'd better have your s--t together when you sing, because she is going to flat bring it every time she opens her mouth," he shared. "It's so effortless. She walks out, it's like Aretha Franklin, Janis Joplin and Brigitte Bardot all rolled into one when she starts singing. It amazes me every night, every chance that I get to sing with her."
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And his gushing didn't quite end there, either.
"I think about the fact that we're married and the fact that we raised these three beautiful daughters. And then I think about having three daughters and having [Hill] for their mom," McGraw added, shortly before tearing up.
"It's a pretty cool thing for those girls to have her."
The two have battled rumors that they're splitting for years now, with the most recent reports claiming that they were headed towards a "$135 million divorce," according to tabloid Star magazine.