Duchess Kate wears blue for National Portrait Gallery visit Kate, Duchess of Cambridge, attends an evening reception to celebrate the work of The Art Room charity at The National Portrait Gallery on April 24, 2013, in London, England. / Getty Duchess Kate has been keeping a busy schedule this week. After celebrating the scouts on Sunday and visiting a primary school in Manchester on Tuesday, she stepped out in London on Wednesday evening to attend an event at the National Portrait Gallery. Wearing a light blue, sleeveless cocktail dress by Emilia Wickstead, the 31-year-old royal mother-to-be was there to celebrate the work of The Art Room, a charity she became patron of last year. The Art Room uses art therapy to increase children's self-esteem, self-confidence and independence. According to the Daily Mail, Kate met with children who were helped by the charity, as well as the staff that worked with them. "I am a firm believer in the power of art to make a difference and The Art Room makes this on a daily basis," she said in a speech at the event. While at the National Portrait Gallery, Kate was photographed passing by a portrait of her husband, Prince William, and brother-in-law Prince Harry. No word on if she stopped to see her own official portrait, which was unveiled earlier this year.