In the first women's major played in Europe, Pettersen beat teenage star Lydia Ko of New Zealand by two shots to win the Evian Championship on Sunday and clinch the second major title of her career.
The Norwegian calmly rolled in her par putt to seal the title. Pettersen then leaned back and held her head in her hands, hugged her caddie and laughed as she was surrounded by friends spraying her with Champagne on the green.
"I might start to get a bit emotional," Pettersen said, her voice wavering, as she collected the trophy.
It was her first major since the LPGA Championship in 2007 and her second straight tournament win after the Safeway Classic this month.