All that glistens is not gold

All that glistens/glitters is not gold.

  (British, American & Australian) also All that glisters is not gold. (British literary)
something that you say to warn someone that sometimes people or things that appear attractive have no real value This film has an all-star cast, but all that glisters is not gold. It fails because of its weak story.
See also: all, glisten, gold, not
References in periodicals archive ?
The one-off course All That Glistens is Not Gold takes place on March 25.