Celebrity·Posted on Nov 5, 2013FYI: Ian McKellen Wears Tighty-Whities With Gandalf On ThemAnd now we know.by Whitney JeffersonBuzzFeed StaffFacebookPinterestTwitterMailLink During the Broadway production of Only Make Believe last night, McKellen dropped down to his skivvies... ...to reveal... GANDALF ON HIS UNDERWEAR. Oh yes. Tap to play GIF Tap to play GIF You shall not pass.