March 15, 1986 in Cherrybrook, Sydney, Australia
Born March 15, 1986 in Sydney, Australia, Courtney and his sister were raised in Sydney's leafy northwest suburbs, attending Galston Public School where their mother, Karen, was a teacher. His father, Chris, was a civil servant with the state electricity company, implying that there were no show business influences in the family when Jai caught the acting bug as a 10-year-old.
He went on to develop his dramatic skills at Cherrybrook Technology High School. At 18, Courtney, like many of Australia's finest thespians before him, tried and failed to win a place at the country's leading acting school, the National Academy for Dramatic Art (NIDA).