Rumors are rife that Kate Middleton wants to get pregnant again, this time with her third baby with Prince William, after the Duke of Cambridge sparked speculations in an interview.

The 33-year-old heir to the throne created a buzz when he was asked by Sky News if they are now planning their third child.

He said, "We've only just had the second one. You never know what is going to happen in the future."

Rumors even heightened when a report from The Daily Telegraph claimed that the 33-year-old Duchess of Cambridge wanted to have their third baby before she turns 35.

The Duchess of Cambridge is already a mother to Prince George and Princess Charlotte who are two years apart from each other.

Kate Middleton just gave birth to the princess last April.

There were even rumors that Kate Middleton will soon be pregnant again when People interviewed the Duchess of Cambridge's uncle who said that the royal couple wants to have another kid.

"Whatever this baby is, there'll be another one," he said.

A report from Mirror also revealed that bookies in the UK have already placed their bets on when Kate Middleton will get pregnant again.

"Royal baby betting went through the roof in the lead up to Princess Charlotte's birth and the odds suggest that we won't have to wait much longer before Will and Kate announce baby number three," Bookmaker Coral's Nicola McGeady said.

Meanwhile, Kate Middleton and Prince Williams' first born recently celebrated his second birthday last week.

The royal family was reported to have travelled to their home in Anmer Hall, Norfolk for the prince's special day, the Inquisitr said in their report.

The Duchess of Cambridgeplanned a nice party for her little tot with the help of Kate Middleton's younger sibling Pippa Middleton and her mother Carole Middleton, who is a party store owner.