The couple confirmed their news on Instagram.
"Introducing Archie Oliver Amos," they penned.
"Our beautiful baby BOY made his entrance into this world yesterday at 1238. Weighing in at 8lbs 6oz. Both Mum and bub are doing amazing ✨"
Hannah and Clint announced they were pregnant back in May.
Archie joins big brother Finn, seven, and Poppy, five.