'It's Always Sunny' stars welcome baby boy

Axel is Kaitlin Olson and Rob McElhenney's first child

"It's Always Sunny in Philadelphia" stars Kaitlin Olson and Rob McElhenney welcomed a baby boy.

Axel Lee McElhenny was born at the couple's home Wednesday afternoon. He is their first child.

Olson and McElhenney met on the FX comedy.
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