Lefteris "Terry" Antonis (Greek: Λευτέρης "Τέρι" Αντώνης; born 26 November 1993) is an Australian association football player who plays for the Western Sydney Wanderers as a midfielder. Born in Sydney, Antonis played youth football at the Australian Institute of Sport before making his professional debut for Sydney FC at sixteen years of age. Antonis has played for Australia on three occasions and was a member of the squad which won the 2015 AFC Asian Cup. He previously represented Australia frequently at youth level, including at the 2011 FIFA U-20 World Cup.