It's Stephen Colbert! He has struck a five year deal with CBS to take over when David Letterman retires in 2015. Although Letterman hasn't announced the date of his final show Colbert is thrilled to take over for the late night legend. I think he's the perfect replacement! Of course Colbert had something funny to say!
"Simply being a guest on David Letterman's show has been a highlight of my career, I never dreamed I would follow in his footsteps, though everyone in late night follows Dave's steps."