Jimmy Fallon can't contain his excitement at being a first-time dad! The Late Night host and his wife Nancy Juvonen Fallon welcomed their first child, a daughter named Winnie Rose, on Tuesday, July 23.

Jimmy talked about being a new dad during his Late Night monologue. "It's been a crazy couple of days — well, actually, just one day. It was just yesterday. It feels like I've had a four day conference."

Credit: Instagram Photo: Jimmy Fallon shares first photo of daughter Winnie Rose

And Thursday night he just shared his first photo of the little lady, captioning his Instagram pic, "I would like to introduce... Winnie Rose Fallon."

So cute — look at her little baby button nose! (But maybe her talk show host dad should've waited until she was awake for her big intro. Imagine if Ed McMahon said "Here's Johnny!" and Carson was napping?)

Not done, Dad also shared Winnie's very first GIF, having his little girl wave "Hi" to fans.

Congrats again to Jimmy, who is obviously going to be a fun dad!

Sources: Us WeeklyInstagramTumblr