Longoria is expecting the child with husband Jose Antonio "Pepe" Baston, whom she married in May 2016 after dating for about three years. Baston is the president of Televisa, a Latin American media company.
While it's Longoria's first child, it is Baston's fourth child.
Like many female celebrities scrutinized by the entertainment press, she has been subject to stories speculating that she's pregnant, based solely on her appearance.
In April for example, she took to Snapchat to deny she was pregnant after photos of her on vacation in Hawaii looking a bit curvier than usual got the rumor mill churning.
"I saw some pictures of myself really fat on a boat. I have to tell you all I did was eat cheese," Eva said, laughing. "Everybody's is saying I'm pregnant and I'm not. I was just lactose intolerant apparently. I just had to share because my whole family is calling me asking me if I'm pregnant. Yes, I look pregnant, but it was just a ball of cheese, a ball of cheese in my stomach."
TMZ first reported Longoria's pregnancy.