Born on May 5, 2016, Boomer is Michael and Nicole's firstborn son. At just 3 months old, Boomer got to see his dad swim at the Summer 2016 Olympics before his retirement. He might not remember it, but when he's older, he'll definitely realise how cool his dad is!
On Boomer's fourth birthday, Nicole shared a gallery of throwback birthday photos, writing: "Happy 4th Birthday Boomer 🎉🎈 You amaze me everyday with your intelligence and talents. Each birthday has brought so much love and laughter, I can't wait to see what today brings 🥰 I'll dig dinosaur bones up with you, ride bikes on the track, bake, paint, sing & dance all you want."