The Cannes Film Festival celebrates its 70th anniversary, May 17-28, with another star-studded edition of the prestigious event. Each year, a host of the world's most glamorous couples take to the red carpet to show off their style in the Riviera town. From Brad Pitt and Jennifer Aniston, to George and Amal Clooney, or Blake Lively and Ryan Reynolds, here's a look at some of the most glamorous couples to walk the Cannes red carpet. How many of them are still together though? You take a guess.