The Duchess of Cambridge, née Kate Middleton, has refused to confirm her exact due date for royal baby number two, but the new arrival could coincide with one of three special dates if born in the next week – namely the Queen's birthday, St George's Day or Prince William and Kate's wedding anniversary.
If born on Tuesday, the baby Prince or Princess will share a birthday with their great-grandmother the Queen. Her Majesty will celebrate her 89th birthday on 21 April.
A St George's Day birth is also a possibility, with the national day falling just two days ahead of Kate's reported due date of 25 April. The day would be a fitting birth date for the fourth-in-line to the throne.
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William and Kate's second baby could share a birthday with the Queen
If Kate's due date is in fact nearer to the end of the month, the baby's arrival could coincide with William and Kate's fourth wedding anniversary on 29 April and serve as the ultimate anniversary gift for the royal couple.
Preparations are already being made outside the exclusive Lindo Wing at St Mary's Hospital in London, with royal enthusiasts gathering in anticipation of Kate's due date.
While Kate is currently residing at Kensington Palace ahead of the imminent arrival, royal aides have confirmed that Prince William could face a two-hour dash to be by his wife's side when she goes into labour as he is currently in the middle of his training with the East Anglian Air Ambulance.
The Queen turns 89 on Tuesday 21 April
William and Kate are keeping the gender of their baby a surprise, like they did with Prince George in 2013, leading to a surge of bets on the baby's gender and potential name. According to Coral, the most popular prediction from punters is that the baby will be a girl called Alice, with Elizabeth and Charlotte other popular names for a little Princess.
HELLO! Online is your destination for all the latest royal baby news as it happens – we'll be live-blogging and tweeting from the moment Kate is admitted to hospital to the first glimpse of the new baby.