Kate Middleton and Prince William undeniably have adorable children, and some people are anxiously waiting for the third royal baby later this year or early 2017.

Bookmakers who have been betting on The Duke and Duchess since their wedding, including the births and names of their children, recently said that odds have been cut to just 4 to 6 for a 2017 Kensington Palace announcement that Prince George and Princess Charlotte will have a sibling.

"A 2016 announcement seems unlikely but if the money's to be believed 2017 looks like a certainty," Jessica Bridge of Ladbrokes said.

"Fans of the Duke and Duchess are hoping the couple make an addition to their gorgeous brood sooner rather than later," she revealed.

"The sight of Kate and Wills with George and Charlotte has sent royal baby watchers into overdrive," Bridge added.

It has only been 17 months since the birth of the Duke and Duchess' latest addition to the family, but the public seems to already be on bump-watch, hoping for another baby in line for the throne.

To recall, Kate Middleton got hit by reports claiming she is pregnant with her third child. Reports even surfaced after the Prince William and the Duchess of Cambridge along with Prince George and Princess Charlotte had recently wrapped up the Royal Tour in Canada.

However, the Duchess did not show any signs of a baby bump during their Royal Tour as claimed by different tabloids.

Interestingly, US Weekly reported that royal couple is planning on expanding their family.

"It would not surprise me if they were pregnant by Christmas," the source said. "I think they both would have been overwhelmed at the thought of a third child a year ago, but now it sounds perfect. They've both always wanted a big family."

Kate Middleton has been repeatedly alleged to be pregnant after the birth of her second child in May 2015. However, no news from the Royal family has confirmed the Duchess' alleged pregnancy since then.