In no particular order:

• Jon Hamm
• Gary Oldman
• Zach Galifianakis
• Louis C.K.
• Philip Seymour Hoffman
• Matthew Lewis (Neville Longbottom)
• Raja
• Bradley Cooper
• Jason Segel
• Colin Firth
• Michael Showalter
• Mos Def
• James Franco
• John Cusack
• Donald Glover, Childish Gambino
• Robin Williams (+ beard)
• John Krasinski