It's Always Sunny in Philadelphia's Kaitlin Olson and Rob McElhenney Show Us the Baby!

"Leo Grey McElhenney..born April 5th after 23 very very long hours. We're in love," Olson tweeted along with a photo of her little bundle of joy looking oh-so-peaceful as he cuddles up to what looks to be an incredibly soft blankie and catches some Z's.

Leo joined the family in the comfort of their own home on 1:15 a.m. Thursday, weighing 8 pounds, 5 ounces, and measuring 20 inches long. He'll be watched over by big brother Axel Lee, 19 months.

And with a sibling named like that, we don't think anyone's going to mess with little Leo.

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