(L-R) U.S. President Barack Obama, Queen Elizabeth II and First Lady Michelle Obama arrive at Winfield House, the residence of the Ambassador of the United States of America, in Regent's Park, on May 25, 2011 in London, England. The 44th President of the United States, Barack Obama, and First Lady Michelle are in the UK for a two day State Visit at the invitation of HM Queen Elizabeth II. Last night they attended a state banquet at Buckingham Palace and today's events include talks at Downing Street and the President will address both houses of Parliament at Westminster Hall. (Photo by Yui Mok - WPA Pool/Getty Images)

A swan is carried down the nave of the cathedral during the Procession of the Animals at the 31st annual Feast of Saint Francis and Blessing of the Animals at The Cathedral of St. John the Divine in the Manhattan borough of New York on October 4, 2015. (Photo by Elizabeth Shafiroff/Reuters)

School children take photographs as Queen Elizabeth II arrives in Valentine's Park Redbridge as part of her Diamond Jubilee tour of the UK on March 29, 2012 in London, England. (Photo by Chris Jackson/Getty Images)

Dancer Elizabeth Suarez, 29, gets ready to perform at the backstage of a cinema where the “Cuerda Viva” (Live Strings) alternative music festival is taking place, in Havana, February 26, 2016. (Photo by Alexandre Meneghini/Reuters)

Blankets cover the bodies of a woman (right) and a man (left background) hit by a northbound Penn Central train (background) as they waited with a crowd at Pennsylvania Railroad station in Elizabeth, N.J. on June 8, 1968 to view the southbound train carrying the body of Sen. Robert F. Kennedy to Washington. The woman was identified as Mrs. Antoinette Severini, 54, and the man, John Curia (age unavailable), both of Elizabeth. (Photo by AP Photo)

Britain's Queen Elizabeth, second left, sits next to fashion editor Anna Wintour, third left, and Caroline Rush, chief executive of the British Fashion Council (BFC) as they view Richard Quinn's runway show before presenting him with the inaugural Queen Elizabeth II Award for British Design, as she visits London Fashion Week's BFC Show Space in central London, Tuesday, February 20, 2018. (Photo by Yui Mok/Pool photo via AP Photo)

Farm animals are walked down the aisle and blessed by church officials during the “Blessing of the Animals” at the Christ Church United Methodist in Manhattan, New York December 7, 2014. (Photo by Elizabeth Shafiroff/Reuters)

American film director Mike Todd and his actress wife Elizabeth Taylor get into a spat after missing their flight from London to Nice on June 22, 1957. (Photo by AP Photo)