Candice Swanepoel is expecting a baby boy.

Candice Swanepoel (c) Instagram

Candice Swanepoel (c) Instagram

The 27-year-old supermodel has announced she and her fiancé Hermann Nicoli, who have been dating for over 10 years, will welcome a little son into the world in September.

Taking to her Instagram account on Tuesday night (17.05.16), the Victoria's Secret beauty uploaded a black-and-white photograph of her burgeoning baby bump alongside the subtle caption: "My Not so little boy (sic)"

The couple's pregnancy news was confirmed back in March when a friend of the pair said they were "so excited" about their impending arrival and were planning to spend the summer in New York getting ready for their new addition.

The source said at the time: "They are very happy. They plan to spend the summer in New York."

And Candice is thrilled she's not the only one in her friendship group expecting, as her best pal Behati Prinsloo and her husband Adam Levine are also set to welcome their first child - a baby girl - into the world around the same time.

The insider added: "Candice and Behati are best friends and they are not far apart from each other in pregnancy due dates. They both have been experiencing the first stages of being pregnant together and are happy to have each other who understand. They can't wait to be mummies!"

Candice and her handsome beau got together when she was just 17 years old after they met in Paris and, following nine years of dating, finally got engaged last year.

Meanwhile, the South African-born beauty has made no secret of the fact she wants a little family of her own.

Speaking prior to their engagement last year, she said: "I would love to have children."