Ross Haylett-Petty (born 10 January 1994) is a South African-born, Australian rugby union player who currently plays for the Melbourne Rebels in the international Super Rugby competition and Toshiba Brave Lupus in the Japanese Top League. Domestically he is contracted to the Perth Spirit who compete in the National Rugby Championship. His regular playing position is as a number eight. Haylett-Petty currently studies a Master of Commerce at Deakin University.