Wearing flowers in her hair the 28-year-old actress exchanged vows with 29-year-old Righton in a low-key ceremony, with just 11 of her closest friends and family.
The couple tied the knot at the town hall in Mazan which a small town around 12 miles from Marseilles.
The actress chose a silver Renault Clio as the car for her casual country-style wedding.
Knightley looked low-key but elegant in a strapless white dress with a tuille skirt and pale pink pumps.
She wore a cropped Channel jacket and her hair was left loose, with a daisy-chain style garland around her head.
The Bend It Like Beckham actress had said she might have a jeans and T-shirt wedding in an interview last year. Her casual dress and the guest who were also dressed casually seemed that she was sticking to that theme.