Sam Worthington, Zoe Saldana & Kate Winslet Attend World Premiere of 'Avatar: The Way of Water' in London (Photos)

Kate Winslet looks chic in a grey gown at Avatar: The Way Of Water world premiere

Palace 'will move swiftly if Harry & Meghan makes direct attack on Kate,' says expert

Zoe Saldana dons a black minidress with overlay as she cosies up to husband Marco at Avatar premiere