The odds of Kate Middleton and Prince William welcoming another royal baby have been slashed again.

Royals fans are betting that the Duke and Duchess of Cambridge will welcome another baby after Prince Louis. However, the odds dropped from 4-1 to 2-1.

"There’s a real buzz around the Royal family at the moment off the back of Harry and Meghan announcing they are expecting their first baby and also Princess Eugenie’s wedding," Coral's Harry Aitkenhead said (as quoted by Express). "Now we’re seeing bets on Prince William and Kate to have a fourth baby and our odds show that we really aren’t ruling out the Duke and Duchess of Cambridge adding to their family."

The fourth royal Cambridge baby became a topic following Prince Harry and Meghan Markle's announcement that they are expecting their first child together. Many speculate that Prince William and Middleton will have their baby announcement, too.

"Baby fever is in full swing in the Royal family right now so it's no surprise to see odds on a fourth Will and Kate baby so short," Ladbrokes spokesman Alex Apati said.

Even before the Duke and Duchess of Sussex's pregnancy announcement, many are convinced that Prince William and Middleton still want another baby. In fact, the betting for the fourth baby Cambridge started after Prince Louis' delivery.

"We have already taken bets on Kate and William having a fourth baby and the odds suggest Prince Louis won't be their last," John Hill of Coral said. "Prince Louis is fifth in line to the throne, therefore he is a big price to ever become King."

Paul Burrell said earlier that both Prince William and Prince Harry wanted more siblings. He suggested that the second-in-line to the throne will have four kids.

However, not everyone agrees that the Duke and Duchess of Cambridge want another baby, especially Middleton, who had difficult pregnancies. One insider claimed that the royal mom of three is unlikely to endure the same struggles.

"I can't imagine Kate will want any more given the ordeal that she goes through every pregnancy. I should think that three children is enough," an insider told People in 2017. "Carole will be absolutely over the moon. The locals are all very happy for her and the family. Kate is a really lovely girl so we are all very happy for her."