Danny DeVito revealed that he almost took legal action after the "It's Always Sunny in Philadelphia" team pranked him with the script on April Fool's.

A new book about "It's Always Sunny In Philadelphia" details the outrageous sitcom's unlikely success, starring Glenn Howerton, Danny DeVito, Charlie Day, Rob McElhenney, and Kaitlin Olson.

Danny DeVito, left, and Charlie Day, photographed at Fox Studios in Los Angeles this month, are back for Season 17 of “It’s Always Sunny in Philadelphia,” which turns 20 this year.

“It’s Always Sunny in Philadelphia” and its eccentric group of pub-owning characters have tickled fans for decades, but nearly cost actor Danny DeVito his life, according to a New York Post ...

DeVito cited just how different "It's Always Sunny" is to filming the 1992 feature "Batman Returns" in which he played villain Oswald Cobblepot AKA the Penguin.

The incident involved a stunt for a Season 11 episode, in which the show’s characters were trapped in a room with a water leak.