"We are really excited," Firestone tells Us. "Ivana and I feel so blessed to be pregnant and to add another child to the family."
This will be the third bundle of joy for the businessman and his model wife, who have been married since July 2008. The couple are also parents to a 4-year-old son, Brooks, and a 2-year-old daughter, Anja.
"Brooks and Anja are already arguing as to whether we will be having a boy or a girl, and who gets to hold it first!" the third-time dad-to-be joked.