Gregory ("Greg") Efthimios Louganis (born January 29, 1960 in El Cajon, California) is an American diver who is best known for winning back-to-back Olympic titles in both the 3m and 10m diving events. He received the James E. Sullivan Award from the Amateur Athletic Union (AAU) in 1984 as the most outstanding amateur athlete in the United States. Louganis is of Samoan/Swedish descent and was raised in California by his adoptive parents, a Greek-American couple.