Kate Middleton
Duchess of Cambridge plans to give birth at the Lindo Wing at St Mary's Hospital againGetty

The Duke and Duchess of Cambridge have confirmed they still do not know the sex of their second child ahead of its expected arrival towards the end of April.

Despite recent speculation over whether Kate Middleton's and Prince William's second baby will be a boy or a girl, the royal couple said they know people are excited Prince George will soon have a "little brother or sister".

The royal couple also confirmed they plan to have the baby at Lindo Wing at St Mary's Hospital in London.

The Lindo Wing was where Prince George was delivered on 22 July 2013, while William and Prince Harry were born there too.

A royal spokesperson said: "The Duke and Duchess are hugely grateful for the warm wishes they have received from people throughout the UK and indeed around the world and over the last few months.

"They know that people are excited that Prince George will soon have a little brother or sister, it means a great deal to them that so many will be celebrating this important moment for their family."

Once the baby is born, the family is expected to spend a few days in Kensington Palace before travelling to Anmer Hall in Norfolk.