Wesley Mann (born September 6, 1963) is an American character actor, best known for his role as the caterpillar on Adventures in Wonderland and for playing the spluttering teacher-turned-principal Mr. Lawler on That's So Raven. Many of Mann's roles are minor and he frequently delivers only a handful of lines, but he has a somewhat distinctive appearance, that of a long-suffering, vaguely glib demeanor that makes him easily recognizable whenever he shows up in a film or on television. He is, by definition, a character actor, and thus he has ne…