Big brother alert:
From the moment Boomer met his little brother Beckett he was ready to be his protector. Just look at how sweetly he holds his brother. So stinking cute!
Monkey fun:
In 2017, Boomer dressed up as a monkey—in a onesie—and it was perfection. Who knew a monkey could be so adorable?
School time:
We know it's a parent's nightmare when their children go to school for the first time, but Boomer was so ready for his first day. That face really says it all.
Towel time:
Clearly Boomer is following in his father's footsteps and we're not mad about it. Their matching towel time proves these two are one in the same and it's super sweet.
Cake break:
Boomer is all of us. He once took a chunk out of his dad's birthday cake and he's now our hero.
Olympian at heart:
From the moment this cutie entered this world it has been clear that he's Team USA. He even has the duds to back it up. He's worn a variety of red, white and blue ensembles over the years, complete with gold medal onesies.
Swan life:
Who says you have to be at Coachella or a grownup to live the #SwanGoals lifestyle? This little guy floated with his mama when he was only a year old.
Stop…party time:
For Boomer's first birthday bash he had a "1st Shark Attack" themed party and we're mad we weren't invited. There was a shark cake, balloons and a second cake just for the birthday boy.
Santa baby:
What's better than getting gifts on Christmas? Getting a new holiday-themed photo of the Phelps' sweetest member, duh.
Olympic debut:
He might not have swum in the 2016 Olympics, but all eyes were on Phelps' number one fan in Rio. With cool shades, special headphones and themed outfits every race Boomer was the one to watch not MP.
Celeb status:
Sure, his dad is the greatest summer Olympian of all time, but does he have as many celebrity fans as Boomer? We don't think so! He's met everyone from Jimmy Fallon to Simon Cowell proving he's a true star.
Water baby:
Like father, like son. Boomer has been a water baby from his first swim and every moment in the water makes us love him even more.