The baby’s news comes just four months after Hilaria suffered a heartbreaking miscarriage, which she documented in real time on social media.
It was the second miscarriage in seven months.
Podcast host and fitness instructor Mom Brain, 36, announced the news on Monday with a video of her naked bump and the sound of the baby’s heartbeat.
She was delighted to hear the sound, captioned the video on Instagram: “Ring … I’m going to let the baby speak because I don’t have the words to express what this sound makes us feel.
“I just got the good news that everything is fine and everything is fine with this little munchkin. I wanted to share this with you. Here we go again. “
It will be the fifth child of actor Alec, 62, with Hilaria, who is expected to join brothers and sisters Carmen Gabriela, six, Romeo Alejandro David, two in May, Leonardo Angel Charles, three and Rafael Thomas, four.
Alec also has a 24-year-old daughter, Ireland, whom he had with his previous wife, Kim Basinger.
Hilaria suffered two devastating miscarriages in the past year, one in April and one in November.
The pregnancy four months ago saw them expecting a baby girl, but unfortunately that was not to be the case after four months.
Hilaria documented the loss at the time and shared a video on Instagram in which she announced, “We are very sad to share that we learned today that our baby died at four months of age.
“We also want you to know that even if we don’t agree at the moment, we will.
“We are so fortunate with our 4 healthy babies – and we will never lose sight of him. I said to Carmen and took this so I could send it to Alec. I guess it’s also a good way to share it with you. ”
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Speaking next to Carmen, Hilaria continued, “I told her that this baby would not come at all … but we will do our best to give her a little sister another time.
“I’m really devastated right now … I didn’t expect that when I went to my scan today.
“I don’t know what else to say … I’m still in shock and I don’t have all that clear. “
The loss saw Hilaria turn to therapy to help her through her second pregnancy loss in seven months.
She said she went “about every week” and that it contributed to happiness.
Hilaria said at the time, “There is nothing to lose by going to someone and talking. I said it from the start: I didn’t agree when it happened, but I knew I was going to be and I wanted to be.
“For me, I really needed to choose happiness in such a difficult time. And I had to work very hard for it. “
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