Beautiful in blue! Duchess of Edinburgh is elegant in a £1,035 dress from Italian brand Etro as she attends star-studded Windsor Castle reception

Sophie looked stylish and sophisticated at the reception held at Windsor Castle The Duchess of Edinburgh looked stunning as she attended a reception this evening that marked 400 years since William Shakespeare's plays were collectively published. Sophie opted for a flowing navy blue dress with gold embellishments as she proved her stylish prowess King Charles III speaks to Dame Judi Dench during a reception at Windsor Castle in Berkshire, to celebrate the work of William Shakespeare The Duchess of Edinburgh and the Duchess of Gloucester attending a reception hosted by King Charles III and Queen Camilla at Windsor Castle Queen Camilla speaks to Joely Richardson and Vanessa Redgrave Charles's interest in Shakespeare dates back to boarding school when he played the title role in Macbeth in 1965. The Duchess of Edinburgh speaks to Joely Richardson, Vanessa Redgrave, and David Oyelowo King Charles III speaks to Helena Bonham Carter during a reception at Windsor Castle British A-listers Vanessa Redgrave, Joely Richardson and David Oyelowo also attended the occasion, where actors performed extracts from Julius Caesar and The Tempest King Charles III and Queen Camilla observe the first Shakespeare Folio at the reception The Duchess of Edinburgh and the Duchess of Gloucester look at a first and second folio of works by William Shakespeare Sir Simon Russell Beale and Dame Harriet Walter performing at the event, pictured left. Pictured right, Dame Harriet Walter and Ray Fearon performing during the reception Sir Simon Russell Beale performing during a reception hosted by King Charles III and Queen Camilla at Windsor Castle Meanwhile, yesterday royal fans took to social media to send celebratory messages to the Queen - who turned 76.