She has seen her star rise thanks to her role in explicit call-girl drama, The Girlfriend Experience.

And Riley Keough ensured she was the centre of attention as she promoted her newest film, American Honey, at the film’s premiere on Sunday afternoon during the 69th annual Cannes Film Festival.

The dark-haired beauty, who is the eldest grandchild of the late Elvis Presley, put on a very busty display as she sported an extremely plunging gown as she hit the red carper alongside the likes of Kristen Stewart.

The 26-year-old stood out from the crowd on the busy red carpet thanks to her mustard and pink frilled crepe dress.

The star ensured she didn’t suffer from a wardrobe malfunction as she drew attention to her ample cleavage in the low cut dress.

Twilight star Kristen stuck with her current sartorial preference of dark and grungy styles as she teamed a black top with a satin column skirt.