Foley, 42, took to Twitter on July 15 to announce the pregnancy news.
“My pregnant wife thought I might want this for my birthday. I’m not the one with the bizarre cravings,” he wrote alongside a pic of his wife.
His wife also tweeted one day before the announcement: “Sometimes you just gotta chill with your donkey. And your baby bump!”
Scott Foley and Marika Dominczyk are already the parents to daughter Malina, 4, and son Keller, 2. The couple got engaged in 2006 and tied the knot in Hawaii in June 2007.