It's hard to tell if this concept came together just because Willie Nelson sort of has Gandalf's hair or just so Willie Nelson could say, "You shall not pass ... an unlit joint, man." Either way, Ian McKellen has definitely seen this thing, tweeting, "Dear Willie, You are far too young to play Gandy.But nice try; have a stoner of a birthday. Love and admiration. Ian." Two things about that: Nelson is actually six years older than McKellen, and McKellen knew Nelson's 80th birthday is on Tuesday. Double-awww!