The 32-year-old royal, who is on a two-day official tour in the USA with his wife the Duchess of Cambridge, spoke to the world leader in Washington about the impending arrival of his second child.
William reportedly told President Obama that he was so excited when Prince George was born in July 2013 that he forgot to ask what gender he was.
“Last time, I remember when George was born, I forgot to work out whether it was a boy or a girl,” he said. “The excitement of the event and everything else was just chaos. You are suddenly… well actually it’s a boy. So now, it’s good,” he added.
“It’s going to be interesting next year. A busy year next year.”
The second in line to the throne met the President and his wife, Michelle, in London in May 2011.
Prince William was also given a tour of The White House by by Vice-President Joseph Biden and his wife Dr Jill Biden.
The Duke of Cambridge later joined First Secretary of State and Leader of the House of Commons William Hague for the International Corruption Hunters Alliance Conference at the World Bank.
Kate remained in New York, visiting a child development centre. The royal couple will meet up again in New York to attend a NBA game, alongside singing royalty, Beyoncé and Jay Z.
