Mac and Dee and baby makes three! Er, four. People reports that It’s Always Sunny in Philadelphia actors Kaitlin Olson and Rob McElhenney welcomed a son, Leo Grey McElhenney, in the wee hours Thursday, April 5. Leo is the couple’s second child; their first son, Axel Lee, was born in the fall of 2010. Olson and McElhenney have starred in FX’s quirky comedy since 2005. The pair married in September 2008.
'It's Always Sunny in Philadelphia' costars have another child
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