Kate Middleton, Prince William Share Baby No. 3 Due Date

Kate Middleton and Prince William's third child is due in April 2018, Kensington Palace shared on Tuesday, October 17. The royal couple announced that the Duchess of Cambridge is pregnant and suffering from acute morning sickness, also known as Hyperemesis Gravidarum, last month.

Princess Charlotte was born on May 2 and Prince George on July 22.Last week, Kate made her first public appearance since announcing her third pregnancy when she attended a reception at Buckingham Palace in honor of World Mental Health Day. She also made a surprise appearance at Paddington Station in London yesterday on Monday, October 16.

"The Duchess' condition is improving but she's still suffering from Hyperemesis Gravidarum," a royal aide shared with E! News.