President Barack Obama, Prince William and first lady Michelle Obama talk with Prince George at Kensington Palace on April 22, 2016, in London.
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Obama and the first lady are greeted by Queen Elizabeth II and Prince Phillip after landing by helicopter at Windsor Castle for a private lunch on April 22, 2016.
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Philip drives the President, the first lady and Elizabeth from the helicopter into Windsor Castle after the Obama's arrived for a private lunch in Windsor, England, on April 22, 2016.
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Elizabeth, the President, the first lady and Philip pose for a photograph in the Oak Room ahead of a private lunch at Windsor Castle on April 22, 2016.
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The President, the first lady and the Duke and Duchess of Cambridge meet in London's Buckingham Palace on May 24, 2011.
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President Barack Obama meets with Prince Harry in the Oval Office on October 28, 2015.
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Queen Elizabeth II poses with the President, the first lady and Prince Philip, Duke of Edinburgh, in the Music Room of Buckingham Palace ahead of a State Banquet on May 24, 2011.
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Jill Biden, Prince Harry and Michelle Obama at the Joining Forces Invictus Games 2016 Event at the Wells Fields House on October 28, 2015, in Fort Belvoir, Va.
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President Barack Obama sees off Queen Elizabeth II, as the Duke of Edinburgh and the first lady follow after a reciprocal dinner at the Winfield House in London, on May 25, 2011.
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Queen Elizabeth II speaks with President Barack Obama during a group photo of world leaders attending the D-Day 70th Anniversary ceremonies at Chateau de Benouville in Benouville, France, on June 6, 2014.
