Hilary gave birth to a baby boy on 20 March, it has been revealed, with the actress herself breaking the news via her Twitter profile:
"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."
Her husband Mike echoed Duff's tweet, posting:
"Welcome to the World Luca Cruz Comrie! Can't express my feelings for you right now."
The pair got married in August 2010 and announced that they were expecting their first child together a year later.