The blonde actress wore a wore a custom-made navy silk chiffon Atelier Versace gown covered in Swarovski crystals with a cut-out back.
This maternity gown is Versace through-and-through as it also has a central split.
As her body is constantly changing, the gown provides extra support with double straps and empire-waist to elegantly showcase the baby bump.
She completed her look with silver Versace shoes, Chopard jewels and a sweeping updo.
There must be something in the water at Cannes, as actress who are usually blah on the red carpet like Eva Longoria and Reese blossom at the Palais des Festivals.