Rob McElhenney (Mac) on the FX TV series It’s Always Sunny in Philadelphia- Weight Gain Formula

Rob McElhenney (Robert Dale “Rob” McElhenney) of It’s Always Sunny in Philadelphia, an American television sitcom, gives his Weight Gain Formula. Rob McElhenney. “I tried to look as ugly as possible, basically,” he said of his remarkable 50-pound weight gain for Season 7. So what exactly compelled the star to transform his alter-ego’s normally fit physique into something a little flabbier? “It came when I was watching a very popular sitcom, and I noticed the people were getting better and better looking as the seasons were going on,” McElhenney said at the Television Critics Association fall TV previews Saturday. “I always thought that what we were trying to do on Sunny was the deconstruction of the sitcom.”

“It came when I was watching a very popular sitcom, and I noticed the people were getting better and better looking as the seasons were going on,” McElhenney said (via TV Guide). “I always thought that what we were trying to do on Sunny was the deconstruction of the sitcom.”