15 of the most expensive billionaire-owned yachts that have been spotted at the Cannes Film Festival

The Cannes Film Festival not only attracts the world's most famous movie stars, but also some of the most expensive yachts on the planet.Forbes has published a running list of all of the billionaire-owned yachts that have been spotted on the Côte d'Azur so far.We've rounded up some of the most impressive and expensive ones.Visit Business Insider's homepage for more stories.The Cannes Film Festival attracts some of the world's most famous actors each year, who attend glitzy premieres and A-list parties fuelled by plenty of Champagne.As a year-round destination for yachts, the festival, which takes place at the Palais des Festivals in Cannes, France from May 14 to May 25, also brings in some of the world's most impressive — and expensive — vessels.Forbes is yacht-spotting live from Cannes, readily updating a list of of more than 50 super-rich yacht owners who have descended on the Côte d'Azur for the festival.Read more: A former flight attendant says these are the 2 worst things passengers can doThe vessels on the list include those which have been spotted in Monte Carlo, Cap d'Antibes, Marseilles, La Ciotat, and St. Tropez.We've rounded up some of the most impressive billionaire yachts that have been spotted at the Cannes Film Festival so far this year, ranked in ascending order by estimated cost or value.