Gregory Efthimios Louganis (/luːˈɡeɪnɪs/; born January 29, 1960) is an American Olympic diver, LGBT activist, and author who won gold medals at the 1984 and 1988 Summer Olympics, on both the springboard and platform. He is the only man and the second diver in Olympic history to sweep the diving events in consecutive Olympic Games. He has been called both "the greatest American diver" and "probably the greatest diver in history".
Louganis was born in El Cajon, California, and is of Samoan and Swedish descent. His teenage biological parents placed him for adoption when he was eight months old and he was raised in California by his adoptive parents, Frances and Peter Louganis. His adoptive father was of Greek descent. Louganis reconnected with his biological father, Fouvale Lutu, in 1984. Through the help of DNA tests and his half-siblings, he found his biological mother in 2017.
He started taking dance, acrobatics and gymnastics classes at 18 months, after witnessing his sister's classes and attempting to join in. By the age of three, he was practicing daily and was competing and giving public performances. For the next few years, he regularly competed and performed at various places including nursing homes and the local naval base. As a child, he was diagnosed with asthma and allergies, so to help with the conditions, he was encouraged to continue the dance and gymnastics classes. He also took up trampolining, and at the age of nine began diving lessons after the family got a swimming pool. He attended Santa Ana High School in Santa Ana, California; Valhalla High School in El Cajon, California; as well as Mission Viejo High School, in Mission Viejo, California.