Ray Treacy Rovers fans when his penalty against Sligo helped win the FAI Cup in 1978. Treacy almost scored a hat trick for the Republic of Ireland national football team against Turkey in April 1978. The two goals he scored (along with the game's opening goal by Johnny Giles) represent the last occasion that a home-based player has scored for the senior Irish national team until 40 years later when in June 2018, Graham Burke, also a Shamrock Rovers player, scored against the United States. Treacy represented the League of Ireland in a friendly against Argentina in the Boca Junior Stadium in
Philip Treacy has noted the support his parents gave him in pursuing his love of millinery, noting that his father would say: "whatever makes him happy". Treacy called his friendship with his significant mentor, Isabella Blow, as: "an affair without sex". Treacy also highlights the importance of fashion model Grace Jones as a collaborator and friend. Treacy is the second youngest of a large family and has eight other siblings, including one sister, the oldest sibling, and seven other brothers. He is particularly close to his sister, Marion Tubbing, who he credits with supplying him with editions of "Harper's and Queen" and