The Duchess, who is around five-and-a-half months pregnant, spoke openly about her pregnancy for the first time while meeting members of the Irish Guards at a St Patrick’s Day parade.
The Duchess made the revelations while speaking to a soldier during the couple’s visit to Mons Barracks in Aldershot, Hampshire, for a St Patrick’s Day parade.
After the parade the couple chatted to soldiers from the 1st Battalion Irish Guards.
“I asked her ‘do you know if it’s a girl or boy?’ and she said ‘not yet,'” said Guardsman Lee Wheeler.
“She said ‘I’d like to have a boy and William would like a girl.'”
Wheeler said the duchess told him the couple had not settled on names for the baby, who will be third in line to the British throne.
Catherine – who was known as Kate Middleton before her marriage – also told Sergeant Thomas Laven she is prepared for many sleepless nights.
The couple, who revealed this week they are so competitive they cannot even finish a game of Scrabble, do not know the sex of their child yet.
Guardsman Jason Perry, 33, also spoke to the Duchess about her pregnancy.
He said: “I wished her congratulations and said I hoped everything is fine. She said ‘yes it is’.
“I asked her if she was excited to be having her first child. She said ‘very’.”
The soldier said it was “absolutely brilliant” to meet the couple and they had both asked him about his 13-and-a-half year career in the Army, which has seen him serve two tours of Iraq and one in Northern Ireland.
Although the couple have thus far kept quiet about the sex of the baby, Middleton may have let slip a small clue to the gender earlier this month during a visit to the National Fishing Heritage Centre in Grimsby, England on March 5.
It was recently claimed the couple are expecting a girl, after a well-wisher presented her with a white teddy bear during an official visit to Grimsby, north England and she said: “Thank you, I will take that for my d… for my baby.”
Sandra Cook, who was standing next to a woman who gave Kate the cuddly toy, said:
“As she handed it over I distinctly heard Kate say, ‘Thank you, I will take that for my d…’ Then she stopped and corrected herself to say, ‘… for my baby’”.
“When she shook hands with me I said, ‘You nearly slipped up there, you were going to say daughter, weren’t you?’ She smiled and said, ‘What do you mean? We don’t know yet’”.
William, who wore the ceremonial dress of the Irish Guards, sipped on a glass of sherry inside the dining hall at the Guardsmens’ cookhouse, while the pregnant Duchess went without a drink.
The pair were loudly cheered by the soldiers as they entered the hall, which gave them welcome shelter from the heavy rain outside, says the Daily Mail.
The Duchess wore the same green Emilia Wickstead dress coat she wore to the event last year, and discovered the perils wearing high heels whilst pregnant as she got her stiletto stuck in grating.
The Duke of Cambridge, however, offered a steadying arm to his pregnant wife as she bent to release her foot, which was trapped at an unusual angle, writes the Telegraph.
The royal couple announced their pregnancy last December, and are expecting their happy bundle of joy in July.
The royal St. Patrick’s Day tradition was started by Queen Alexandra, the wife of King Edward VII, in 1901.