All the royal babies born in 2018

The world is on baby watch for Duchess Kate and Prince William's third child. And while we're anxiously anticipating the little one's arrival, the little prince or princess isn't the only royal baby due this year.

In fact, there have already been three other royal baby births just in the beginning of 2018.

Serbia's Prince Philip and wife Danica welcomed Stefan in February, their first, while Princess Madeleine of Sweden gave birth to her third child with husband Chris O'Neill in early March, joining older siblings Leonore and Nicolas. Hanover's royal couple Prince Ernst August Jr. and designer wife Princess Ekaterina Malysheva also welcomed Princess Elisabeth in February, just 7 months after the two wed in July.

Plus, there are more regal children on the way. Queen Elizabeth's granddaughter Zara Tindall is expecting her second child with husband Mike this summer, reportedly only a couple months away from Kate Middleton's due date. The couple announced the news in January after revealing they miscarried during their second pregnancy over Christmas 2016.

The baby will join older sister Mia, who is almost 4.

Monaco's royals Pierre Casiraghi and Beatrice Borromeo are also reportedly expecting their second child. Beatrice and Pierre, who is the grandson of Grace Kelly, already have son Stefano.

It seems like 2018 is the year for royal babies!

Related: Celeb babies coming this year