Georges St-Pierre, also known by his initials GSP, is a Canadian actor and 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 and has defeated every opponent he has ever faced. St-Pierre is a three-time former UFC Welterweight Champion, having won the title twice and the interim title once between November 2006 and April 2008. St-Pierre was ranked as the #1 welterweight in the world for several years by Sherdog and numerous other publications. In 2008, 2009 and 2010 he was named the Canadian Athlete of the Year by Rogers Sportsnet. Fight Matrix lists him as the top MMA welterweight of all time and most accomplished fighter in MMA history.