The former First Daughter and TV reporter announced on U.S. morning show Today on Monday (06Apr15) that she and her husband Henry Hager are preparing to be parents again.
Bush Hager, 33, is due to give birth to a girl in August (15).
She tells People.com, "We're so excited... I'm ready to tell the world!... I appreciate life so much more as a mom. And I feel so lucky."
The couple wed in 2008 and is already parents to daughter Mila, who turns two next week (begs16Apr15).