Rob McElhenney & Kaitlin Olson: Expecting!

If you don't know who Kaitlin Olson and Rob McElhenney are, we're not surprised. But maybe you should, because they may just have the funniest baby ever.

The stars of It's Always Sunny in Philadelphia, who are married, are expecting a new addition to "the gang" - their first child in August, the couple's rep says.

"Rob and I are so excited it's stupid," Olson said in a statement. "The last few years have been pretty amazing for us and just when we thought things couldn't get any better, the greatest little thing in the world happened!"

"We're totally beside ourselves."

So are we, at the possibility of the ridiculous It's Always Sunny in Philadelphia quotes that could result from this. We put nothing past the cast of the FX cult hit.

Kaitlin Olson and Rob McElhenney married in September 2008.

It's Always Sunny, which McElhenney created, stars in and executive produces, returns for Season 6 in September. Olson recently appeared in Leap Year with Amy Adams.