Louganis, 53, married paralegal Johnny Chaillot, 52, Saturday evening at Geoffrey's in Malibu.
"It was amazing because I have so many people from all facets of my life here tonight and they are all here and celebrating it is all wonderful," Louganis told PEOPLE immediately following the sunset ceremony. "I already feel different. The ceremony was so reflective and representative of who we are."
The recent Splash coach and Chaillot began dating in 2012 after finding each other on the online dating site Match.com and became engaged almost exactly a year later on April 8.Louganis is well-known for winning multiple Gold medals in diving for the United States, and later revealing in his 1995 autobiography Breaking the Surface that he competed and won his medal at the 1988 Olympics (in Seoul, Korea) after becoming HIV-positive. During a 1996 interview with Oprah Winfrey he discussed publicly his sexual orientation and HIV-positive status for the first time. Breaking The Surface was made into a televised movie starring Mario Lopez.
Hat/tip to Joe.My.God