Jewelry at the Cannes Film Festival

Natalie Portman wasn't walking down the red carpet when this photo was taken, but her diamond collar necklace would have worked just as well with a gown as it did with casual wear. Two more pendant necklaces round out her natural look -- far different from her appearance at the premiere of Blindness. The festival doesn't end until March 25th -- it should be interesting to watch styles evolve over the next week.

_{Photo by Dave Hogan/Getty Images}