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.
22,000 people agreed to clean toilets for WiFi because they did not read the terms.
Tools designed to ensure computer code in smart cars does not crash has been inspired by hungry penguins.
The rounded sleeping capsules send guests drifting into ocean before arriving on desert island by morning.
Sitting on the saddle activates the part of the brain responsible for learning, a study has claimed.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.