Russell Brand reprises his role as Aldous Snow from Forgetting Sarah Marshall in th 2010 movie Get Him To The Greek. He wears at least two pairs of sunglasses, one of which is a pair of Alexander McQueen 4099 sunglasses. The sunglasses are dark ruthenium with silver frame and gray gradient lenses (color code KJ1/VK).
Thanks to Michael for the ID!
Reference: Alexander Mcqueen AMQ 4099/S, dark ruthenium/silver/gray gradient (color code KJ1/VK)