Michael Phelps, wife expecting second child

NEW YORK, NY - AUGUST 21: Michael Phelps, Nicole Phelps and Boomer Phelps attendthe Huggies Little Swimmers #trainingfor2032 Swim Class With The Phelps Foundation on August 21, 2017 in New York City. (Photo by Dia Dipasupil/Getty Images for Huggies)

By Juliakate E Culpepper

Aug 30, 2017

Retirement continues to be good to Michael Phelps.

On Tuesday, Phelps and wife Nichole announced on Instagram they are expecting their second child.

“Number 2 on the way!!!! So excited!! Wonder if it's a boy or a girl?” Phelps wrote.

Number 2 on the way!!!! So excited!! Wonder if it's a boy or a girl??

A post shared by Michael Phelps (@m_phelps00) on Aug 29, 2017 at 9:26am PDT

Phelps’ son, 15-month-old Boomer, was born in May 2016.

Boomer’s popular Instagram page posted a photo reacting to the news that he’ll be a big brother.

"So excited to see what mama is having!!" the announcement post said. "Do I get to have a brother or a sister?!?"

So excited to see what mama is having!! Do I get to have a brother or a sister?!?

A post shared by boomer phelps (@boomerrphelps) on Aug 29, 2017 at 9:27am PDT