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.

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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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