Grace Kelly's granddaughter Charlotte Casiraghi seemingly confirms she's pregnant

We're only halfway through 2018, but it's already been a busy year for royal babies.

Sweden's Princess Madeleine had daughter Princess Adrienne in March, the Duke and Duchess of Cambridge welcomed Prince Louis in April, and Zara Phillips became a mum of two last month with the arrival of baby Lena Elizabeth Tindall.

Now, it seems the royal family of Monaco will be the next to welcome a new member, thanks to Charlotte Casiraghi.

Since March, rumours have swirled that the daughter of Princess Caroline of Hanover is pregnant with her second child.

According to a Hello! magazine report from May, the granddaughter of Princess Grace Kelly is due to give birth in August.

The baby already has two cousins very close in age, with Charlotte's two brothers, Pierre and Andrea, both celebrating family arrivals of their own this year.

Pierre became a father for the second time in with the arrival of Francesco Carlo Albert in May, while Andrea welcomed son Maximilian Rainier in April.

Her second child will be her first with fiance Dimitri Rassam, who also has a child from his previous marriage.

The couple seemingly confirmed their engagement earlier this year, when fans spotted a large engagement ring on the mum-to-be's finger at a Monte Carlo charity event earlier this year.

At the time, it was claimed Charlotte and Dimitri had become engaged during a ski holiday in Austria and were planning to wed in Italy in June or July.

Charlotte, a published writer and magazine editor, is ninth in line to the Monagesque throne.

She is the second child of Princess Caroline and Stefano Casiraghi, who died in a boating accident when she was four. Princess Caroline is now married to Prince Ernst August of Hanover. 

Charlotte's film producer fiance is the son of French actress and model Carole Bouquet, who is an acquaintance of Princess Caroline.