Helena attended a dinner held at Windsor Castle to celebrate the work done by The Royal Marsden, of which the Duke of Cambridge is president. The star-studded guest list included Helena’s co-stars, Emma Watson and Lily James, as well as the likes of Benedict Cumberbatch, Cate Blanchett, Cara Delevingne, Kate Moss and Emeli Sandé. While at the event, Helena shared an amusing little anecdote:
The Duke and I met before, along with the Duchess, before they were married, when I was staying on Mustique. I got very drunk at one point and I was determined to ask him to be a godfather to my daughter. He quite wisely said no. I admire him. He has got the same grace as both his parents.
Helena wore Ralph Lauren Collection Silk Taffeta Colleen gown, with diamond Sunburst hair-brooch and statement earrings.