The 34-year-old model has welcomed her second child with her partner, businessman Antoine Arnault, who she has been dating since 2011.

They already have a son Maxim, two, together, and Natalia is mother to children Lucas, 14, Neva, 10, and eight-year-old Viktor with estranged husband Justin Portman too. Last Saturday (04Jun16) she added son Roman to her brood.

Natalia posted a photo of her newborn's little foot with a hospital band around his ankle on Instagram, accompanied by a heartfelt caption.

"Last Saturday (RUS below) early in the morning, our family welcomed a new baby boy: Roman," she told followers. "A beautiful little shrimp, discovering the world already with the help of his brothers and sister, and making Papa very proud. I am well, even if a bit tired, but ready for a big summer! Thank you to all my friends for their messages and to everyone for their support."

Natalia also shared the message in her native language, Russian, and fans were quick to congratulate the mother-of-five on her new bundle of joy.

During her pregnancy the fashion star didn't hold back on wearing fun flirty outfits, despite her burgeoning bump.

For an event in London, U.K. in February (16) she opted for a sparkling bright red custom made Calvin Klein minidress, which showed off her perfect pins.

"It was a challenge, because I'm five months pregnant," she laughed to about dressing for the bash, which she hosted. "For a sexy event like tonight, I'm a host. I want to look amazing. I don't want people to be like, 'Oh my gosh, Natalia's pregnant! She looks great… for a pregnant person!' I want them to just say, 'She looks great!' Without the pregnant part. The only way to avoid this is go for a short dress, tons of legs, and a loose shape. I need to bet on my legs that they'll distract everyone. I'm wearing very high heels."