Biografia

He is the only cast member of "It's Always Sunny In Philadelphia" who is from Philadelphia.

Although his character in ''It's Always Sunny In Philadelphia'' is very homophobic, Rob was raised by a lesbian couple who have a Domestic partnership.

Worked as a waiter before his acting career took off and even kept it during the first season of ''It's Always Sunny In Philadelphia (2005)''.

In June 2011, the New York Daily News reported that Rob McElhenney had gained 50 pounds in the previous 6 months specifically so that he and the other writers for It's Always Sunny in Philadelphia (2005) would be able to start making "fat jokes" about his character, Mac--particularly ones capitalizing on the pun, "Big Mac". A gain (or loss) of 50 pounds in 6 months represents a very rapid and potentially unhealthy rate of weight change.

Rob and his wife, Kaitlin Olson, had their first child, a son named Axel McElhenney (b. September 1, 2010).

Dramas need to have a certain aesthetic that comedy just doesn't really seem to need to have.

Regardless of your metabolism, if you stop consuming so many calories, you will lose weight.

I feel like it's a dangerous and dark world if 'Sunny' becomes mainstream comedy. If you were to turn on CBS at 8 o'clock on Thursday and see an episode of 'It's Always Sunny In Philadelphia,' I don't know if I want to live in that world.

If anything, when you're in your late 20s, early 30s, and then mid-30s, you're getting less attractive.

It just so happens that people aren't doing comedy about abortion or cannibalism or waterboarding. And that to me doesn't necessarily mean that there aren't aspects of those subjects that are funny, it just means that people are too uptight.