"We couldn't be happier," Hilaria Baldwin wrote with a photo of the lad.
"Here we go again," the "Mom Brain" podcaster wrote alongside an Instagram video that revealed the baby's heartbeat.
The wife of actor Alec Baldwin said she hit "rock bottom" when she lost another child this month.
The yoga instructor, who had a previous miscarriage in April, posted a heartbreaking video with her 6-year-old daughter.
"She wants to have another one," the actor told Kevin Nealon on "Hiking With Kevin."
“I am surrounded by such love and I feel so fortunate,” the yoga instructor wrote on Instagram.
"I’m pretty sure this is not going to stick," she told the "Today" show of her pregnancy.
The wellness influencer shed light on the "secrecy" of the first trimester.
"#BaldwinitosEverywhere," the actor wrote.