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Kaitlin Olson, Rob McElhenney

Jason LaVeris/FilmMagic

It's another sonny day for Rob McElhenney and Kaitlin Olson.

The It's Always Sunny in Philadelphia stars and real-life husband and wife welcomed a son, their second child together, in the wee hours this morning, People reports.

So, what did the couple, so rude and despicable to each other on TV and so cute together in real life, name their little one?

One hint: not Paddy.

The utterly precious-sounding Leo Grey McElhenney joined the family at 1:15 a.m., weighing 8 pounds, 5 ounces, and measuring 20 inches long. Like big brother Axel Lee, 19 months, he was born at home.

"We are overjoyed," McElhenney and Olson told People.

May the Dayman always watch over the four of them.