Jimmy Fallon always has great craic with his guests.

Post Malone was Tuesday night's guest and he sat down with Jimmy for a pint and a good old fashioned sing-song.

Both looking dapper and backed by the show's in house band Roots, they gave their rendition of Seven Drunken Nights.

The Dubliners song is often heard at a lock-in and the lads did their best to nod to the Irish.

Both gave a go at a slight Irish twang, which wasn't as offensive as it could be.

Post even nailed his pronunciation of the word Thursday.

However, we can't make peace with that questionable looking pint of Guinness.