Hilary, 24, and husband Mike Comrie, 31, have named their new arrival Luca Cruz. He was born on Tuesday March 20, weighing 7lb, 6oz.
The new mum announced her happy news on Twitter with the message:
"Welcome to the World Luca Cruz Comrie! Tuesday evening, we became proud parents of a healthy 7 pound 6 ounce beautiful boy.
"We are overjoyed and feel like the luckiest parents in the world. He is surrounded by so much love!! Mom and baby are both doing extremely well."
Welcome to the World Luca Cruz Comrie! Tuesday evening, we became proud parents of a healthy 7 pound 6 ounce beautiful boy.
- Hilary Duff (@HilaryDuff) March 22, 2012
Luca is Hilary and Mike's first baby. They married in 2010, and Hilary announced her pregnancy on their anniversary with the message:
"I can't believe it has already been a year, time really flies when you're having fun!
"We also want to share the exciting news that BABY MAKES THREE!!! We are extremely happy and ready to start this new chapter of our lives."
Congratulations Hilary and Mike!