While Tim McGraw and Faith Hill have made it clear they are not splitting up, the Highway Don't Care singer is said to be opening up about a family matter that has been kept under wraps for years.

Tim Talks Faith 'Putting Good Images In His Head'

McGraw will chat with none other than queen of talk Oprah Winfrey for the Oprah's Master Class special series. He'll have an "emotional conversation" about "the family secret that would change his life forever."

He will also dish on growing up in a small Louisiana town, his 17-year marriage to Hill and what he has learned while being a father to three girls Gracie Katherine, Maggie Elizabeth and Audrey Caroline.

Faith Tells Tim to 'Get It Baby' on Instagram?

Barbara Walters, Justin Timberlake, Robin Roberts, Billy Bob Thornton and Whoopi Goldberg are just a few of the well-known celebrities who will be featured in the upcoming season. Be sure to check out McGraw's appearance on Oprah's Master Class on OWN June 8 at 10/9c.

News of his appearance comes as rumors spread that McGraw and Hill have put aside divorce rumors and are expanding their family and adopting a baby boy.

An insider said, "They'd love to have a boy to go along with their three daughters. It's something they've debated doing over the past few ears, but they've finally agreed to it."

The source added that the superstar couple wanted to have another child but after complications in a previous pregnancy with their youngest daughter Audrey, 12, they don't want to "push [Hill's] luck with another pregnancy."

They said they want to adopt the baby boy by winter.

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Tim McGraw, Tim McGraw Faith Hill