The event's been held since 2003 at the Domaine National de Saint-Cloud park west of Paris. With over 100,00 people in the audience and acts spread over four stages, there are over 60 acts playing.
The three-day event sees acts like Phoenix, Nine Inch Nails and System of a Down on the bill, other acts include ex-Smiths guitarist Johnny Marr, Savages and Skip the Use.
Meanwhile, Fauve, JC Satan and Team Ghost are on the bill, three highly recommended French bands.
There also seem to be quite a few Scottish bands on the bill, including long-term francophiles Belle and Sebastian, indie legends The Pastels and more recent breakthrough act Chvrches.
Meanwhile, Franz Ferdinand play on the Friday night.
I'm still surprised more UK music fans don't make a trip to France for a festival, as at just over 100 Euros for a three day ticket it represents great value and the chance to see 60 acts including some that are playing the much more expensive UK festivals.
And it's in France, which is always a good thing.
It's a busy weekend for Phoenix, who also play at the Leeds and Reading festivals, having already played events like T in the Park and Vielles Charrues festival in France earlier this summer.