The French Riviera became 'The Kingdom of the Crystal Skull' this weekend as the new Indiana Jones movie premiered at the Cannes Film Festival -- and ET was there!

HARRISON FORD, CATE BLANCHETT, SHIA LaBEOUF, KAREN ALLEN and Indy collaborators STEVEN SPIELBERG and GEORGE LUCAS proudly walked the red carpet to debut the fourth installment of the adventure saga – almost 20 years in the making!

Our own MARY HART and ET Executive Producer LINDA BELL BLUE were guests at the premiere, while other high-wattage celebs who checked out the long-awaited adventure pic were NATALIE PORTMAN, STAR JONES, GOLDIE HAWN, SALMA HAYEK, DENNIS HOPPER and Harrison's lady love CALISTA FLOCKHART.

In theaters everywhere May 22, 'Indiana Jones and the Kingdom of the Crystal Skull' finds the intrepid archaeologist battling nefarious Russians (led by a black-haired Cate) in a globetrotting adventure that once again may put the entire world at stake.