Catriona Elisa Magnayon Gray (born 6 January 1994) is a Filipino-Australian model, singer, and beauty pageant titleholder who was crowned Miss Universe 2018. She is the fourth Filipina to win the pageant. Previously, Gray was crowned Miss Universe Philippines 2018 and Miss World Philippines 2016.

Gray was born in Cairns, Queensland, to a Scottish-born father, Ian Gray, from Fraserburgh, and a Filipina mother, Normita Ragas Magnayon, from Oas, Albay. Gray is reportedly named after her paternal grandmother, Catherine Gray (née Ross), an immigrant to Western Australia from Scotland in 1952 and Elsa Magnayon (née Ragas), her maternal grandmother from Oas, Albay, Philippines.

Gray was a student at Trinity Anglican School in Cairns where she was a house captain and a school chorister. She received a master's certificate in music theory from the online school of Berklee College of Music in Boston, Massachusetts. In addition, she obtained a certificate in outdoor recreation and a black belt in Choi Kwang-Do martial arts. Furthermore, Gray was lead singer of her school's jazz band; she also starred in local productions of Miss Saigon. After graduating from high school, she moved to Manila where she worked as a commercial model.