The Princess of Wales showed off her green credentials at the Earthshot Prize awards ceremony in Boston - by wearing a rented gown.Kate dazzled on the green carpet with her dress of the same hue as five innovative ideas were celebrated and awarded £1 million in prize money to scale up their projects.She paired the frock with sparkly heels and jewels from her late mother-in-law Diana, Princess of Wales. Other celebrities who walked the green carpet on Friday night included actor Rami Malek and singer Annie Lennox.