Prince William Speaks About Prince George's Birthday at America's Cup With Princess Kate

— -- Prince William and Princess Kate boarded a catamaran adorned with the royal standard to cheer on the United Kingdom team at the America’s Cup World Series in Portsmouth, England.

Kate is patron of the 1851 Trust, a sailing charity led by Sir Ben Ainslie who is captaining the British Solent and seeking to bring the America’s Cup back to the UK. Ainslie is credited with masterminding the United States win at the last America's Cup in a come-from-behind victory sailing with the Americans.

The Royal couple stopped by Ainslie’s crew’s training base at the BAR Land Rover headquarters supporting the British challenge. Zac Kay, a 10-year-old sailing fan, asked Prince William the question every journalist was dying to ask but didn't get the chance.

"What did Prince George get for his birthday?” the young boy questioned.

Prince William replied coyly.

"I'm not telling,” William replied, adding, "He got too many things. He's far too spoiled. He's not into boats yet."

William and Kate were decked out in matching polo British team tops with The Duke and Duchess of Cambridge written on the back. The future King and Queen rode in a chase boat at speeds up to 40 knots watching the UK, US, Japan, New Zealand, France and Sweden teams race.

The teams are competing for points to take on the defending champs, the Americans, in Bermuda next year. Britain edged out the U.S. in the challenge today in Portsmouth. William and Kate presented trophies to the competitors before a crowd of thousands.