Jimmy Fallon and Nancy Juvonen's baby was born via surrogate.

The chat show host and his wife - who welcomed daughter Winnie into the world last month - struggled for some time to have a baby of their own and eventually turned to a surrogate to help them start a family.

Speaking in an interview with Samantha Guthrie for 'Today', he said: ''My wife and I had been trying a while to have a baby. We tried a bunch of things - so we had a surrogate.''

Jimmy, 38, and Nancy, 46, kept their impending parenthood a secret until Winnie was born and they could introduce her to everyone.

He said: ''We said, 'We're not going to tell anybody.' It'd be just more fun if it's just private between me and my wife. And then we get to introduce her to everybody.''

Jimmy recently spoke of his excitement at becoming a dad and revealed despite his exhaustion he was loving every minute of it.

He said: ''I'm pretty tired. But basically it's a weird type of tired, where it's like you're so tired but you don't feel exhausted, you feel like, 'I just have to do this, so I'm gonna keep moving through this pace.' It's fun, it's fun tired because you're just excited to what she does next. It's exciting.

''Last night we were giving her a sponge bath and she loves it when you put the water on her head, her little head, she has a tiny little round head...She's a great baby. Doesn't cry.''

Jimmy isn't the only one who is can't get enough of Winnie, his dog Gary also can't resist the tot.

He explained: ''The real Gary is super cute, totally protective. Loves her.

''This morning we were feeding her, and Gary walked up and she was like, 'I'm cool, don't worry about me.' And quickly looked over and licked her head. It was really cute. Because she smells so good and everyone would like to lick her head, but Gary gets away with it 'cause she's a dog.''