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Obamas greeted by royal family at Buckingham Palace

Murray Sanders / WPA Pool via Getty Images

Queen Elizabeth II and U.S. President Barack Obama review an honor guard of the First Battalion Scots Guards at a ceremony of welcome at Buckingham Palace on May 24.

Murray Sanders / WPA Pool via Getty Images

U.S. President Barack Obama reviews an honor guard with Prince Philip, Duke of Edinburgh at Buckingham Palace on May 24.

Charles Dharapak / AP

U.S. President Barack Obama and first lady Michelle Obama meet with Britain's Prince William and the Duchess of Cambridge at Buckingham Palace in London on May 24.

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Prince Charles walks with U.S. President Barack Obama as they leave Winfield House, the official residence of the US Ambassador, in Regent's Park in London on May 24.

Kevin Lamarque / Reuters

U.S. President Barack Obama shakes hands with Queen Elizabeth II as first lady Michelle Obama and Prince Philip, Duke of Edinburgh, look on, at Buckingham Palace in London on May 24.

msnbc.com staff and news service reports: President Obama and his wife Michelle are in the UK for a state visit at the invitation of Queen Elizabeth II, who is hosting them for two nights at Buckingham Palace.  They were welcomed to the palace this morning in an elaborate arrival ceremony, and will be toasted at an intimate banquet for about 200 royals and other dignitaries Tuesday evening.

Royal watchers say the queen has taken a liking to the Obamas ever since meeting the couple during their 2009 visit to London.

Read more on President Obama's visit to the UK.