"We are very happy and look forward to welcoming a new member to our family," the 32-year-old princess, who is fourth in line to the throne, and the British-American banker said in a statement.
The couple's soon-to-be son or daughter is said to be due in the summer (sounds like mom and dad are going to have a busy household!).
Madeleine and O'Neill, who met in New York where they now reportedly reside, tied the knot in June 2013 before it was revealed just three months later that the princess was pregnant with the couple's first child (little Leonore is fifth in line to the throne).
The happy news comes just three months after it was announced that Prince William and Kate Middleton are expecting their second child. Prince George's mama, who was forced to cancel a number of appearances early in her pregnancy due to her suffering from hyperemesis gravidarum, is expected to give birth in April 2015.
