"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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