• Britain's Prince William and his wife Catherine, Duchess of Cambridge, arrive for the Commonwealth Observance service at Westminster Abbey in London March 9, 2015

Britain's Prince William and his wife Catherine, Duchess of Cambridge, arrive for the Commonwealth Observance service at Westminster Abbey in London March 9, 2015 (Photo : REUTERS/Stefan Wermuth (BRITAIN - Tags: ROYALS RELIGION ANNIVERSARY ENTERTAINMENT))

Duchess of Cambridge Kate Middleton has finally revealed her due date as she is expected to deliver her second child in mid-to-end April.

The Duchess was visiting Brookhill Children's Centre in London's Woolwich, when she made the big confession. "I'm due mid-April, to the end of April. Not long to go now," said the Duchess on being quizzed when exactly the sibling of Prince George is expected, People reported.

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The pregnant Duchess looked absolutely stunning in a polka dot ASOS maternity dress, which was paired with matching black shoes. The 33-year-old stunner was an immediate hit among the kids who presented her with a handmade card.

She was her usual charming self during the whole visit and she cheerfully interacted with small kids and tried to mingle with them.

Prince George did not accompany Middleton on her visit. However, he was missed at the event and was presented a gift bag containing the "Elmer The Elephant" book, a color-sorting block and an informative booklet on potty training of toddlers.

The Duchess has given a fair idea when her second child would be arriving. But the gender of the baby is strictly kept under wraps. Media outlets and publications have no clue about the sex of Middleton and Prince William's yet unborn child, speculations are raised that it is a girl this time.

The speculations were fueled when the Duchess was spotted going through baby girl's clothes recently at a store. Her interest in pink colored girl outfits is pointing towards the possibility of a baby sister for Prince George, according to Christian Today.

"She was very interested. Every mom that comes in the shop, they look for boys' [clothes] but they always end up looking at the girls' stuff, too. We all hope it's a little girl because it will be so cute, they will be like a little couple." The aforementioned publication quoted Amaia store co-owner, Segolene Tresca.