Shai Gilgeous-Alexander was born in 1998 in Toronto, Ontario, Canada. He is the son of Charmaine Gilgeous and Vaughn Alexander. Vaughn coached Shai when Shai was young. Charmaine is a former track star who competed for Antigua and Barbuda at the 1992 Summer Olympics. Shai played at three different high schools. He began in Hamilton, Ontario at St. Thomas More Catholic Secondary School before switching to Sir Allan MacNab Secondary School. He then transferred to Hamilton Heights Christian Academy in Chattanooga, Tennessee for his junior and senior years. His cousin is fellow NBA player Nickeil Alexander-Walker. Follow SGA on Twitter (@shaiglalex) and Instagram (@shai).