Marion Marechal-Le Pen, the niece of National Front leader Marine Le Pen and the French far right's rising star, might well walk up the steps of the Cannes Film Festival next spring as leader of the region if she wins elections on Sunday.

The National Front (FN) pulled off a historic win last weekend, topping the vote in the first round of regional polls, a breakthrough that shook up the country's political landscape before the 2017 presidential election.

If it wins one or more regions in Sunday's runoff, that would be a first for the party, leaving the French public and much of the wider world to contemplate what would happen in a region ruled by the far right.