The 'Simpsons' has been on for well over 20 years. It debuted in 1989. Starting on August 21 and running through September 1,  going around the clock all 552 episodes will air on FXX leading up to their 26th season and the ‘Simpson’s World’ app launch.

This means each and every episode, back-to-back for 10 days straight. Not to be overlooked, the Simpsons movie will also be a part of the longest TV marathon ever!

So set your DVRs, hope you have one of the newer ones that can hold that much programming!