Phelps and his wife Nicole Johnson were both able to keep the marriage news completely quiet during this past Olympic Games in Rio despite the increasing interest in the couple's wedding plans.
But it's not like the new father is the first of his kind to keep things completely under wraps when it came to his marital status, in fact, he's one of many famous faces in Hollywood to stay silent about the special day.
And after months of speculation, E! News confirmed that Scarlett Johansson married her longtime fiancé Romain Dauriac in an uber-private ceremony in Montana surrounded by only very close friends, family, and of course, their baby daughter Rose.
So it seems as though Phelps has even more in common with ScarJo as his little son Boomer was also said to be present for the ceremony this summer as well!
Congratulations once again to the, well, semi newlyweds!