Alec Baldwin and his wife are expecting their first child together.
Hilaria Baldwin, 28, a yoga instructor, revealed the news to TV show Extra, where she's also a special correspondent, saying: "We're having a baby! It was a surprise, a wonderful surprise."
30 Rock star Alec said that his wife hadn't told him she was taking a pregnancy test, when he got the news.
"There's a scream I heard, which is a scream normally reserved if there's a spider in the house, not exaggerating," he said.
"Normally, I will be reading a book. We're in the country, it's quiet, some time to really relax and unwind and sometimes, once a month, you hear 'Ahhh, Alec, Alec!' I come upstairs, and there's a spider on the wall. So then I hear that scream again, but it was not a spider."
The actor's publicist Matthew Hiltzik confirmed the baby is due late this summer.
The couple wed last June after a three-month engagement.
Alec, 54, is the father of a 17-year-old daughter, Ireland, from his previous marriage to actress Kim Basinger.
30 Rock concluded its seven-year run two weeks ago.