London - His wife may be due to have her baby soon, but Prince William isn't one to sit tight and wait for the news - instead, he's been playing polo.
Many in the British press have predicted that the first child of the prince and the Duchess of Cambridge, formerly known as Kate Middleton, was expected to arrive on Sunday.
Dozens of bleary-eyed photographers and cameramen have been standing guard around the clock on royal baby watch outside St Mary's Hospital in London.
But the prince was enjoying a game of polo with his brother Prince Harry at a charity match at Cirencester Park Polo Club, almost 161 km west of the capital, on Sunday.
William appeared relaxed and was seen greeting locals who went up to meet him in footage broadcast on Sky News.
Announced by a bulletin
According to bookmaker William Hill, most people were betting money on a royal birth on Sunday, Monday or Tuesday.
Officials have said that the baby is due around mid-July, but have not released a due date. The birth, when it does come, will be announced by a bulletin posted on a wooden easel placed outside Buckingham Palace.
It's a time-honoured royal tradition — the birth of William's father, Prince Charles, was announced the same way in 1948. This time, however, officials have adapted to modern times by adding a simultaneous announcement on Twitter, so that millions around the world can get the news within seconds.
Rupert Adams, spokesperson for William Hill, said that the most fervent betting has been on the name of the baby. Alexandra, Charlotte, Elizabeth and George are among the top contenders so far, he said.