Michael Phelps, Nicole Johnson Welcome Baby Boomer Robert Phelps

Photo Courtesy: Michael Phelps/Instagram

Michael Phelps, who scratched out of the Atlanta Classic Swim Meet next week, just announced the birth of his baby boy Boomer Robert Phelps with fiancee Nicole Johnson.

The couple welcomed their child two days ago on May 5 at 7:21 p.m., but withheld the announcement of the birth until after Michael’s sister Hilary Phelps’ wedding took place today

Phelps, who had just been in Colorado Springs at the Olympic Training Center (as seen in this Facebook Live video tour of the facility), rushed back to Arizona on Thursday to be with Nicole.

Welcome Boomer Robert Phelps into the world!!! Born 5-5-2016 at 7:21 pm !!! Healthy and happy!!! Best feeling I have ever felt in my life!!! @nicole.m.johnson and Boomer both healthy!!! #boomerphelps ? @boonestudios

A photo posted by Michael Phelps (@m_phelps00) on May 7, 2016 at 10:22am PDT

Earlier today, Michael congratulated his sister on her wedding.

@hilary_phelps huge congrats to you and @dougeldridge !!! Mr and Mrs. Eldridge!!! Love you guys!!!

A photo posted by Michael Phelps (@m_phelps00) on May 7, 2016 at 10:18am PDT

The two announced via Instagram that Nicole was pregnant back in November 2015.

We found out 8weeks ago we were expecting… Today we're over 12 weeks and it looks like we're having a boy!!! #babymp #mp #lifeabouttochange #mpswim ? @djnolan5

A photo posted by Michael Phelps (@m_phelps00) on Nov 18, 2015 at 8:02am PST

The duo were engaged in February of 2015, with Phelps’ good friend Allison Schmitt providing the engagement picture.

I'm gonna be a Mrs. ?? @m_phelps00 ?❤️ ?: @arschmitty

A photo posted by Nicole Michele Johnson (@nicole.m.johnson) on Feb 21, 2015 at 10:53pm PST

There has never been an Olympian with the first or last name of "Boomer," according to the experts at sports-reference.

— Nick Zaccardi (@nzaccardi) May 7, 2016