10/30/2016 7:03 AM PDT BY TMZ STAFF
Turns out Michael Phelps‘ secret wedding was not a super casual affair at all … it was a full-blown, formal ceremony.
TMZ Sports broke the story a few days back, that Michael and Nicole Johnson tied the knot June 13th and kept it secret from the world for months.
BTW … Nicole changed her name to Nicole Phelps … good move.
Now we know there were dozens of guests, all of whom kept their traps shut for 4 months and especially during the Olympics … which makes the secret even more awesome.