August 02, 2016 03:00 PM

Michael Phelps‘ son is already following in his footsteps.

On Sunday, former Olympic gold medalist and current NBC swimming analyst Rowdy Gaines tweeted a photo of a pair of Under Armour shoes belonging to the 31-year-old Rio-bound swimmer.  Inked onto one of the insoles? Twelve-week-old Boomer Robert‘s tiny footprint.

“Loving @MichaelPhelps shoes [with] son Boomer’s foot imprint on one of them,” the caption read. “So dang cute.”

Nicole Johnson/Instagram

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Phelps recently posted an abs-tastic Instagram photo of himself and friends at his last American practice before the kickoff of the 2016 Summer Olympics, where he will serve as a captain of the U.S. swim team alongside five of his teammates.

“Last practice on American soil complete!! Nothing like a little fun afterwards with the crew!! #number5 #letsdothis #mp #mpswim,” he captioned the snap.

RELATED GALLERY: 12 Winning Pics of Michael Phelps’ Son Boomer

Of course, baby Boomer and Phelps’ fiancée Nicole Johnson have been missing their main man as he preps for the Olympics,which begin later this week.

“Boomer & I are missing this handsome stud this morning,” she wrote next to a photo of Phelps and their son in July. “#30daystogo #butsomuchfuninbetween #groufits.”

Jen Juneau

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