Kate Middleton & Prince William’s Baby #3 Due Date Revealed

Kate Middleton is expecting her third child with Prince William, but when are they due?

Kensington Palace revealed the due date on Twitter Tuesday, writing, "The Duke and Duchess of Cambridge are delighted to confirm they are expecting a baby in April 2018.”

A day before the announcement, Kate was seen showing off her small baby bump while dancing with a Paddington Bear character at a Charities Forum event in London.

Last month, Kate and William announced they were expecting. At the time, Kensington Palace said in a statement, "Their royal Highnesses The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting their third child. The Queen and members of both families are delighted with the news.”

A source told Us Weekly, "They've known for a while and didn't particularly want to announce it before the 12-week mark, but due to having to cancel an engagement, they thought it was best to be honest about the situation. The same thing happened before. She suffers terribly in these early weeks, but she has a great medical team and a fantastic support system."