It seems Prince William was so overwhelmed with the birth of his son, Prince George, that he forgot to ask the doctors if his first child was a boy or a girl!

"I remember when George was born, I forgot to work out whether it was a boy or a girl. The excitement of the event and everything else was just chaos. You are suddenly… 'well actually it's a boy,' William joked to President Obama during his solo visit to Washington D.C. earlier today.

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William and President Obama on Monday, Dec. 8.

The Duke of Cambridge, 32, flew to the nations's capital in the early morning on Monday, Dec. 8 to meet with the president, 53, and deliver a speech at the World Bank on stopping illegal wildlife trafficking.

Related Story: Kate Middleton and Prince William Arrive in NYC — Plus all the Details of their U.S. Visit!

By lunchtime, William jetted back to NYC where is pregnant wife, Kate Middleton, also 32, was busy chatting with children and helping to wrap holiday gifts at Harlem's Northside Center for Child Development.

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Kate in Harlem, N.Y. on Monday, Dec. 8.

Later this afternoon William met with former Secretary of State Hillary Clinton and former First Daughter, Chelsea Clinton, in the Big Apple.

The couple will reportedly reunite this evening to attend a Brooklyn Nets basketball game.