All he needs is a pot of gold! Will Ferrell stopped by CBS’s Late Show With David Letterman Tuesday in full leprechaun attire to honor St. Patrick’s Day. Of course, the comedian who is known for his wild antics didn’t stop there. The 47-year-old made time to sing a wacky rendition of the Irish classic “Danny Boy.” The Get Hard star wore a green tailcoat with matching pantaloons, a shiny yellow vest, as well as some snazzy, buckled shoes. Letterman took one look at Ferrell and revealed, “Earlier today, when I was told you were coming out dressed as a leprechaun, I told myself that will be stupid, but you look like a billion dollars, my friend!”