Michael Phelps and Pregnant Wife Nicole Pose with Their Three Sons as They Celebrate Thanksgiving

The couple recently confirmed they will welcome baby No. 4 next year

Michael Phelps' brood will be getting bigger this holiday season.

The Olympic swimmer, 38, celebrated Thanksgiving with wife Nicole Johnson — who is expecting the couple's fourth baby  — and sons Maverick, 3, Beckett, 5, and Boomer, 7.

The group posed together on their last Thanksgiving as a family of five, smiling as the boys wore blue button-down shirts and USC shorts.

"Happy Thanksgiving!!" the soon-to-be father of four captioned the sweet outdoor shot. Of his kids' outfits, he explained, "They love USC, but today it’s big blue😂!!"

Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

Related: Michael Phelps Gives Fans a Glimpse into His Whirlwind Weekend with His Wife and 3 Sons — See Photos

The parents of three boys announced on Instagram that their family was growing yet again in an anniversary post shared earlier this month.

The pair — who have been married since 2016 — posed for a photo at a recent NFL game where Johnson put her baby bump on display.

The soon-to-be mom of four shared the Instagram post to celebrate the couple's new addition, as well as her seventh anniversary with the Olympic champion swimmer.

"For those that are wondering… yes! we’re expecting our 4th Phelps in 2024 💙💙💙💙," Johnson wrote alongside the carousel of images.

The 23-time Olympic gold medalist met his now-wife in 2007 at the ESPY Awards, and they connected right away. At the time, Johnson was a pageant competitor and model, who would go on to become Miss California USA in 2010, and even place in the top 10 of the Miss USA finals that same year.

After dating on and off for a few years, the couple got engaged in 2015, and later wed in 2016, holding three separate ceremonies.

The parents are very happy to have a house full of boys. Johnson especially enjoys the dynamic and the family refers to her as the "queen of the household."

"I think Nicole said something along the lines of, like, 'I'm so lucky to have a house full of boys and no girls,' and Boomer looked at her and said, 'Mommy, you're the girl in our house.' So we've been saying that and it's true, she's the queen," Phelps has said of Johnson.

For more People news, make sure to sign up for our newsletter!

Read the original article on People.