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Accompanying her husband Prince William, who has been a president of BAFTA since 2010, the Duchess of Cambridge joined Hollywoods finest on the red carpet tonight wearing a dark green Jenny Packham gown

Its strapless design highlights the shoulders and neckline with elegant simplicity, while the smooth satin fabric adds a luxurious sheen

Slip into style wearing this long black sweetheart a-line prom dress by Blondie Nites

Advertisement Beatrice also owns both the black and white versions of the Self-Portrait style as well, having worn the lighter-colored blazer dress in a photo her sister, Princess Eugenie, posted for Beatrices birthday this summer