But Phelps also grabbed more gold this summer -- a wedding ring.
"Truly the happiest day of my life," Nicole wrote on Instagram.
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Photos: Olympic champion Michael Phelps married girlfriend in June
CHASKA, MN - SEPTEMBER 27: Swimmer Michael Phelps of the United States waves during the 2016 Ryder Cup Celebrity Matches at Hazeltine National Golf Club on September 27, 2016 in Chaska, Minnesota. (Photo by Sam Greenwood/Getty Images)
