's longtime fiancee, Paulina Gretzky, was on hand to celebrate as Johnson claimed his first-ever Masters title by five strokes, becoming the the only player to finish 20 under in the tournament's history.
Johnson's win is his second major championship, after winning the 2016 U.S. Open. He finished last season's outing at Augusta in a tie for second place, which was his career-best finish at the Masters.
She was also in attendance when Johnson won the Tour Championship over Justin Thomas and Xander Schauffele in September.
Johnson first met Gretzky, a model who is the daughter of NHL legend Wayne Gretzky, in 2009.