Fresh from his turn as a leather jacket-clad porn-junkie in his directorial debut Don Jon, Joseph Gordon-Levitt has been doing the rounds on the US late night chat shows this week.

Thankfully, however, he's ditched the Jersey boy attire, washed the wet-look gel out of his hair, and pulled on some rather tasty tailoring. Which, incidentally, is from ASOS....

Check out the video below of Gordon-Levitt on Jimmy Kimmel's show for a masterclass in how to look sharp in a suit, without looking stuffy.