After a grueling two weeks, Maria Sharapova and Sara Errani took Court Philippe Chatrier for the final.
The No.21-seeded Sara Errani had scored her first two Top 10 wins en route to her first Grand Slam final.
But Maria Sharapova, the No.2 seed, had the experience - six previous Grand Slam finals with three titles.
Sara Errani only hit 11 unforced errors in the match but Maria Sharapova blasted a whopping 37 winners.
After a forehand long on her first match point and a Sara Errani drop shot on her second, the time came...
Maria Sharapova ended a long exchange with a huge angled backhand to finally put Sara Errani away, 63 62.
The two 25-year-olds were playing for the first time and it was the more experienced player who prevailed.
Maria Sharapova had secured a return to No.1 two days before and on Saturday won her first French Open.
Sara Errani and three-time Roland Garros champion Monica Seles posed with Maria Sharapova and her trophy.
Maria Sharapova posed in the locker room after her historic victory - she completed her career Grand Slam.
Maria Sharapova is the sixth woman in the Open Era and 10th all-time to complete the career Grand Slam.
Maria Sharapova won her first three at Wimbledon in 2004, the US Open in 2006 and Australian Open in 2008.
Maria Sharapova will return to the No.1 spot this week, her 18th career week as the top player in the world.
Maria Sharapova is the first player, male or female, to win a Grand Slam after undergoing shoulder surgery.
Maria Sharapova now ties Kim Clijsters for third-most Grand Slam titles among active players, with four.