The news was revealed on Thursday by representatives for the couple.
They were seen arriving in Nice in a private jet with their family ahead of the nuptials.
Jolie, 39, and Pitt, 50, wed in a chapel called Chateau Miraval, ahead of the nondenominational civil ceremony, AP reported.
They are said to have obtained a marriage licence from a Californian judge who also presided over the wedding.
The stars, who have three adopted children and three biological children together, have been together for nine years.
Brad Pitt, who met Jolie while filming Mr. and Mrs. Smith in 2004, was previously married to Jennifer Aniston for five years, until 2005, while Jolie has been married twice before: to Jonny Lee Miller from 1996 until 1999, and to Billy Bob Thornton for three years until 2003.
The couple’s eldest sons, Maddox and Pax, reportedly walked Jolie down the aisle, while Shiloh and Knox were ring bearers and Zahara and Vivienne threw petals during the ceremony.
Jolie discussed their low key marriage plans in May to People magazine.
We’re just waiting for it to be the right time with the kids, with work, when it feels right. We talk about it occasionally, and the kids talk about it with us.
Which is verging on hysterical, how kids envision a wedding. They will in a way be the wedding planners. It’s going to be Disney or paintball — one or the other! We’ve got a lot of different personalities in the house. They’ve got some strong opinions. It will be fun. That’s the important thing. When we do it, it will feel like a great day for our family.