Kate Middleton and Prince William's third baby may arrive on St. George's Day.

Royal fans are betting that the new addition to the Duke and Duchess of Cambridge's family will arrive on April 23 or Saint George's Day. In fact, the Bookmaker Ladbrokes have given 10/1 chances for this date. If the fifth-in-line to the throne will indeed arrive on the said date, it will be another reason for celebration.

"It would be such a wonderful coincidence if Kate was to give birth on St George's Day, and patriotic punters have forced us to cut the odds on the newest member of the Royal family entering the world on April 23rd," said Jessica Bridge of Ladbrokes.

On the other hand, bookie competitor Betway has 5/1 odds for Middleton giving birth on St. George's Day. Meanwhile, if the new addition to the Cambridge's will arrive at a later time, it might coincide with other royal celebrations.

"There's a few big days coming up in the royal calendar which the birth of William and Kate's baby could coincide with," Betway's Alan Alger said.

Prince William and Middleton will be celebrating their seventh wedding anniversary on April 29. Meanwhile, Princess Charlotte will turn 3 years old on May 2.

In related news, Middleton is reportedly only a few weeks away from her due date. But the Duchess of Cambridge is still busy at work.

Middleton is set to visit the Place2Be's new headquarters in London on Wednesday. Then on March 12, the Duchess will join Queen Elizabeth II, Prince William, Prince Harry and Meghan Markle for the Commonwealth Day service.

If Middleton will take on more royal engagements after that, then she may be due end of April.

In related news, the royal fans are speculating about the gender of Middleton and Prince William's upcoming baby. Some think that the Duchess is expecting a girl because her baby bump is high. It was lower when she was expecting Prince George. But an expert said that the royal's baby bump has nothing to do with the gender of her baby.

Meanwhile, some speculate that Prince George and Princess Charlotte's upcoming sibling is a boy because Middleton wears blue dresses lately. Ulrika Johnson, who predicted her own pregnancies accurately, also believes that Middleton is having a boy.