Model and actress Emily Ratajkowski and her actor and producer husband Sebastian Bear-McClard have welcomed their first child.

"Sylvester Apollo Bear has joined us earth side. Sly arrived 3/8/21 on the most surreal, beautiful, and love-filled morning of my life," the 29-year-old wrote on Instagram.

In October, Ratajkowski wrote an exclusive article forVogue,alongside a 'pregnancy reveal video' directed by her good friend Lena Dunham, in which she explained that she would not be telling us the gender of her child.

"When my husband and I tell friends that I’m pregnant, their first question... is almost always 'Do you know what you want?' We like to respond that we won’t know the gender until our child is 18 and that they’ll let us know then. Everyone laughs at this," she wrote.

In a 2000 word essay, which you can read in full here, Ratajkowski grappled with the idea and fear of raising both genders, pondering that she likes the "idea of forcing as few gender stereotypes on my child as possible".

Watch: A snippet of Ratajkowski's pregnancy announcement.

Ratajkowski wrote that her husband worried if they had a little girl, they "will have a lot to live up to as your daughter." A concept she herself 'winched' at.

She was equally as apprehensive of having a son too, "although not in the same way. I've known far too many white men who move through the world unaware of their privilege."

Ratajkowski has been vocal about her feminism ever since she was thrust into the spotlight in Robin Thicke's film clip for 'Blurred Lines' in 2013.

Right now pre-order is open for her bookMy Body,which will explore “what it means to be a woman and a commodity, how men treat women, and why women permit it."

Last year, she also wrote an essay for The Cut about sexual assault and being sued for sharing photos of her own body, analysing how, as a model, "my image, my reflection, is not my own."

But Ratajkowski has made sure her body's experience of pregnancy is the opposite, posting updates on her growing belly over recent weeks and months for her 27 million Instagram followers.

"Sometimes I feel like Winnie the Pooh in human form, other times like a fertility goddess with a juicy butt. I took this on a day where I was feeling the latter. Either way I know I’m going to miss this bump and those kicks very soon," she wrote in February.