Always Sunny Cast Takes an Awkward Family Portrait – with Kitten Mittens
08/18/2011 AT 09:00 AM EDT
The cast of FX's It's Always Sunny in Philadelphia is kicking off its upcoming seventh season with the addition of a furry feline costar.
In a newly released promotional photo, Charlie Day, who plays Charlie Kelly on the show, happily poses with one of his character's many cat companions displaying the famed Kitten Mittens muffling device.
The portrait also gives fans a good look at costar Rob McElhenney's 50 lb. weight gain, which the actor underwent to expand his character Mac's comedic story lines. "It's been disgusting to watch him go through with this adventure," Day said. "But it has definitely made Mac a lot funnier."
It's Always Sunny in Philadelphia, which also stars daddy-to-be Glenn Howerton, Danny DeVito and McElhenney's real-life wife Kaitlin Olson, returns Sept. 15 on FX.