London , England -LRB- CNN -RRB- -- The first double portrait of Britain 's Princes William and Harry went on display Tuesday at the National Portrait Gallery . The painting shows the brothers dressed in their military uniforms , chatting to each other at their home at Clarence House , near Buckingham Palace . It is the first portrait to show William and Harry together , the National Portrait Gallery said . It will now hang in the museum alongside other portraits of the royal family . Artist Nicky Philipps said she was able to capture an informal moment , `` a behind-the-scenes glance at the human element of royal responsibility , and to emphasize their brotherly relationship . '' Commissioned by the National Portrait Gallery , the painting shows Prince Harry seated next to Prince William , who is standing to his left . They are wearing the dress uniform of the Blues and Royals regiment of the Household Cavalry , where they are both lieutenants . William also wears the the star and blue sash of the Order of the Garter , a British order of chivalry , which the queen awarded him in 2008 . William , 27 , is now training to be a search-and-rescue pilot with the Royal Air Force , where he holds the rank of flight lieutenant . Harry , 25 , who served in Afghanistan , is training to become a pilot with the Army Air Corps . `` The first portrait of the princes captures them formally dressed , but informally posed , '' said Sandy Nairne , the museum 's director . `` It is a delightful image which extends the tradition of royal portraiture . '' The National Portrait Gallery said it was appropriate that the princes were pictured at Clarence House , which used to be the home of the late Queen Mother . Part of a painting of the Queen Mother is visible above Harry 's shoulder in the portrait , and paintings from her private collection are seen behind William . Philipps , 45 , has had high-profile commissions before , but said it was a `` great privilege '' to paint the two princes . `` They were very good company and although I was commissioned to paint them in their official context , I hope I have also captured some of the brotherly banter that characterized the sittings , '' she said .