Tyrion Lannister sounds much less handsome than Peter Dinklage is in the show:

"Tyrion Lannister, the youngest of Lord Tywin’s brood and by far the ugliest. All that the gods had given to Cersei and Jaime, they had denied Tyrion. He was a dwarf, half his brother’s height, struggling to keep pace on stunted legs. His head was too large for his body, with a brute’s squashed-in face beneath a swollen shelf of brow. One green eye and one black one peered out from under a lank fall of hair so blond it seemed white."

 But he is just as clever so who cares?! :)

“Remember this, boy. All dwarfs may be bastards, yet not all bastards need be dwarfs.” And with that he turned and sauntered back into the feast, whistling a tune. When he opened the door, the light from within threw his shadow clear across the yard, and for just a moment Tyrion Lannister stood tall as a king.