Reba McEntire's son Shelby Blackstock is expecting his first child - a baby boy.

The former NASCAR driver - whom the singer has with her 69-year-old ex-husband, music manager Narvel Blackstock - and his wife, Marissa, made the joyous announcement outside Cinderella Castle in Magic Kingdom Park at Walt Disney World, Orlando, Florida, on Wednesday (15.04.26).

In a series of adorable shots posted to Instagram, the couple posed outside the theme park icon as they held up a white onesie that featured an embroidered sleeping Mickey Mouse and "Blackstock October 2026" in blue lettering, embraced each other and showed images from a sonogram.

The pair captioned the sweet joint post: "Oh, BOY! We're beyond excited to FINALLY announce our little man is coming in October," the couple wrote in the post. "See ya real soon, pal! Mommy + Daddy love you! (sic)"

Fans showered Shelby, 36, and Marissa, 33, with congratulatory messages in the upload's comments section.

One follower penned: "OMG!! A baby boy!!! How exciting! Congratulations to you both! How stinking cute is this announcement!! (sic)"

A second supporter typed: "Woohoo!!! We are SOOOO happy for you guys!!! (sic)"

And a third fan wrote: "Congrats! Best news ever (sic)."

Shelby and Marissa's son will be the first biological grandchild for singer-and-actress Reba, 71, whose late stepson, talent manager Brandon Blackstock - who died in August 2025 aged 48 after a battle with melanoma, a form of skin cancer - and his 43-year-old ex-wife, singer Kelly Clarkson's children, River, 11, and son Remy, 10, regard her as a grandmother.

Shelby and Marissa met on the dating app Tinder in 2014, and they started dating two years later.

In February 2022, they told People: "We made fast friends early on and have had a strong bond ever since. We are twin flames. There's this indescribable feeling of déjà vu when we are together -- as if life is reminding us that we're following our destiny.

"In retrospect, our mutual friends could see how compatible we are. They would always recommend that we should date; I think we were the only ones who didn't see it (at the time).

"The love was always there; we just didn't understand it until we were both in the right headspace and had the maturity to recognise it. We both agree that if we had dated immediately upon meeting, we likely would not be as prepared as we are now to deserve one another."

Shelby popped the question at Epcot - the second theme park at Walt Disney World - on New Year's Eve in 2020, where they held a cocktail hour and dinner at Rotunda Bistro ahead of their fairytale wedding in February 2022.

The wedding then moved to Magic Kingdom, where Marissa walked down the aisle to the Beauty and the Beast theme tune in front of Cinderella Castle.