Sharing a series of sweet photos with her daughter Marlowe, Eva proudly showed off her bump side-on. She wrote: "It is with so much joy, crazy excitement, and immense gratitude that Kyle, Marlowe and I would like to announce we are expecting a new addition to our family this fall!
"Kyle and I can't wait to watch what a funny and loving big sister Marlowe will be, and we are cherishing our last months with her as the sole centre of our universe."
"We are expecting A BABY BOY!!!" Eva wrote on her website
The proud mum then revealed the sex of her baby, writing: "Aaaaand, because we have no patience and don't expect you to either, we would also like to tell you that we are expecting A BABY BOY!!!"
Eva and sports broadcaster Kyle married in October 2011. The couple welcomed their daughter Marlowe in August 2014. One year later, shortly after Marlowe's first birthday, Eva sadly revealed that she had suffered a miscarriage at nine weeks.
The Martino family is no doubt ecstatic about the arrival of their little boy in autumn, and judging by little Marlowe's facial expressions, the youngster is just as thrilled by the prospect of becoming a big sister.
"Kyle and I can't wait to watch what a funny and loving big sister Marlowe will be," she added
Eva's pregnancy announcement comes just weeks after she opened up about an incident involving her nanny. The actress had to fire the unnamed woman after she sent a sexually explicit text to Eva's husband Kyle while Eva was out of town.
"Clearly the text was not a mistake," the actress wrote on her website. "If it had been a mistake, she would have been humiliated, so frantic to make it right. That text was sent as a missive to test the proverbial waters with my husband and give her an opportunity later, when alone, to bring up a sexy dialogue with him."