Introducing Bear Payne, "Liam and Cheryl couldn’t decide on a name for ages and kept toing and froing between options.
"But they both loved Bear and settled on it a few days ago. Despite the sleepless nights, the couple are completely smitten with little Bear," a source told The Daily Mail.
The name is very popular with the celebrity set, Jamie and Jools Oliver also chose the name for their son.
The former One Direction singer announced the arrival of baby Bear on Instagram writing, "My close friends and family know there are very few times when I'm left speechless... wow! I'm incredibly happy to welcome our new baby boy into the world, it's a moment that I will never forget for the rest of my life and my favourite memory I have so far. I'm completely in awe of his incredible mother and how she has been the whole way through this, she's really made my dreams come true. We haven't named him yet but he's already capturing hearts including mine. I feel very blessed. Happy Mother's Day everyone!"