Jessica Chastain dazzled at the Cannes Film Festival on Tuesday ( 21May13) as she attended the 50th anniversary screening of Cleopatra wearing a diamond and sapphire Bulgari necklace once owned by Elizabeth Taylor. The movie star hit the red carpet in a basic white Versace gown so as to highlight the priceless gems around her neck - a gift to Taylor from her then-lover and Cleopatra co-star Richard Burton, who fell in love with the screen beauty on the set. Chastain still couldn't believe she had been chosen to model the great movie dame's jewels at Cannes, telling reporters, "I call them the Cleopatra jewels because Richard Burton bought them for Elizabeth Taylor when they fell in love when they were shooting Cleopatra. I'm so excited to be wearing them. "They looked so fabulous on her and she was a movie star from her head to her toes. That kind of glamorous star doesn't exist anymore but the diamonds do." Chastain hosted the special screening Taylor's son Christopher Wilding and Burton's daughter Kate.