The couple welcomed their son in October of last year
The retired defensive end, 34, celebrated Koa's first time dressing up, with his entire family going as characters from the movie The Incredibles. The football player went as Mr. Incredible while his wife opted for Mrs. Incredible, sharing the photos on Watt's Instagram.
The couple's 12-month-old son went the character of Jack-Jack, the youngest child of Mr. and Mrs. Incredible.
"Live Action Remake coming to theaters October 2027," JJ joked in his caption.
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Last month, Watt, who retired from the NFL after last season, was honored by the Houston Texans with a spot in the team's Ring of Honor during halftime at the team's faceoff against the Pittsburgh Steelers at NRG Stadium.
The stadium erupted into cheers for the iconic defensive end, who held his son in his arms. Koa was dressed in a Watt jersey with sound-canceling headphones on as he looked around and took in the sights.
The couple caught up with PEOPLE in September, smiling proudly as they explained how Koa is already taking an interest in sports.
“I imagine we'll be coaching in some capacity in the future,” Watt said, adding that his favorite toy this summer has been a soccer ball.
“He loves chasing it around and kicking it,” he added.
The Watts said their summer was full of traveling, often visiting with their siblings so that Koa can spend time with his five cousins. Kealia's sister, Megan Cushing, has three boys, and JJ’s brother Derek Watt has two sons.
“We’ve loved it. We've gotten to travel so much with him,” Kealia said. “It’s been really, really special.”
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