Jenna Bush Hager is celebrating eight years with her firstborn.
The Today co-host, 39, marked daughter Margaret "Mila" Laura's 8th birthday on Tuesday, paying tribute to her eldest with a sweet message written alongside a gallery of family photos on Instagram. Bush Hager also shares daughter Poppy Louise, 5, and son Henry "Hal" Harold, 21 months, with husband Henry Hager.
"Happiest Birthday to our dearest Mila. EIGHT years ago you came into the world fast and spirited — making me a mom — changing me forever," she writes. "Your creativity, leadership, empathy and heart INSPIRE."
"On the night you were born," continues Bush Hager, "the moon smiled with such wonder that the stars peeked in to see you and the night wind whispered, 'Life will never be the same.' "
Want to get the biggest stories from PEOPLE every weekday? Subscribe to our new podcast, PEOPLE Every Day, to get the essential celebrity, entertainment and human interest news stories Monday through Friday.
Jenna Bush Hager/Instagram
"Our mom made sure my sister and I were surrounded with wonderful books from the time we were babies," Bush Hager said of former First Lady Laura Bush, who used to work as a librarian.
"Most often, my parents would read to us in their bed. The four of us would all be in there together while my mom and dad took turns reading out loud. That gave us such a cozy, secure feeling," Bush Hager said, later noting that she also got her love of mystery novels from her dad.
Bush Hager also discussed her kids' sibling dynamic, sharing that "the girls win" when it comes to spending time with baby Hal, who gave their brother his nickname.
"Mila said recently, 'He's the baby of our dreams!' " the mom shared.
And once able to travel again, Bush Hager wants to show her three kids "all the magnificent parts of our country." She explained, "My mom passed down her love of the national parks, and I got engaged in Acadia National Park."