We suspected there might be a few red dresses tonight, and Sigourney Weaver has proved us right by turning out in crimson chiffon.

The Avatar star has ticked a lot of trend boxes by opting for a grecian-style, one-shouldered Lanvin number, with jewellery by Neil Lane and shoes by Jimmy Choo. The colour makes a change from the predominant hue of her dystopian movie, which is nominated for Best Picture. “I’m in red tonight, but I’m still blue underneath”, she joked.