Georges St-Pierre (French pronunciation: [ʒɔʁʒ sɛ̃ pjɛʁ]; born May 19, 1981) is a Canadian former professional mixed martial artist. He is widely regarded as one of the greatest fighters in mixed martial arts (MMA) history. St-Pierre was a two-division champion in the Ultimate Fighting Championship (UFC), having won titles in the welterweight and middleweight divisions.