Congratulations to Michael Phelps and wife Nicole! The parents of 15-month-old Boomer announced the are expecting baby #2.

Phelps posted a pic of his wife and son on Instagram making the initial announcement. The Olympian captioned the photo:

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

It was followed by a post on Boomer's Instagram of a very happy big brother and a very positive pregnancy test. This pic was captioned, "So excited to see what mama is having!! Do I get to have a brother or a sister?!?"

Nicole and Michael married in private a month after Boomer was born right before the Rio Olympics. Boomer has been famous since then, being the best baby ever handling the noise of not only the crowd, but his mom and grandma screaming when his dad repeatedly won gold medals.

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The question now is it is a boy or a girl? What do you hope the Phelps have?