Looks like Alec and Hilaria Baldwin will have 4 under 5: They're expecting their fourth child next year. "Our Baldwinitos are getting a new teammate this spring. I’m gonna make them a special cake to tell them if it’s a boy or a girl...I’ll post it tomorrow midday," Hilaria posted on Instagram Friday alongside a picture of herself, Alec, and their existing brood. "We are so excited!" The Baldwins are already parents to Carmen, who turned 4 in August, 2-year-old Rafael, and 14-month-old Leonardo, ETOnline reports. (More Alec Baldwin stories.)