The infant will be the first child for the Duke and Duchess of Cambridge, who got married in April 2011, and will be third in line to the British throne.
The Palace also offered an update on Middleton's health, after she was hospitalized for severe morning sickness in December.
"The Duchess's condition continues to improve since her stay in hospital last month," according to the statement.
Are you excited about the arrival of the royal baby?
- Royal Families
- Buckingham Palace