Duchess Kate Middleton and Prince William reveal when baby No. 3 is due

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It's official, Duchess Kate and Prince William have announced when we can expect the arrival of baby number 3!

Today, Kensington Palace revealed that the new bundle of joy will be joining sister Charlotte, 2, and brother George, 4, in April 2018

Royal fans are crossing their fingers for an April 29th arrival date to help Kate and William celebrate their anniversary.

Because Kate suffers from Hyperemesis Gravidarum, Kensington Palace announced the royal pregnancy early -- only a few days into September. The condition causes severe morning sickness and dehydration, forcing the Duchess to pull out of a number of engagements, including missing Prince George's first day of school

Related: Inside the Duchess' maternity style 

Last month, while Prince William gave a worrisome update on her condition, he did hint that the new baby may be arriving sooner than we thought! 

"All the best with the midwifery, I may see you sooner than you think," he told a midwife at a royal engagement. 

It seems that the Duchess, however, is feeling better. Last week, she showed off her baby bump in her first engagement since the pregnancy announcement. And just yesterday, the Duchess made headlines for her adorable dance with Paddington the Bear

Kensington Palace also announced that prior to the birth, the Duke and Duchess of Cambridge will "undertake an official visit to Norway and Sweden" in 2018.  

Related: Kate dances with Paddington