Rob McElhenney announced in a statement released this week that he has been diagnosed with "a host of neurodevelopmental disorders and learning disabilities".
The actor, 46 - who is best known for shows like It's Always Sunny in Philadelphia and Mythic Quest - shared the news with his followers on Twitter on Monday night.
He stated that he will go through "the full diagnosis" at a later date and revealed that whilst he wouldn't usually open up about it, he has a particular reason for having done so.
