Possible Clues:

• Ethan or Joel of film
• Filmmaking brother Joel or Ethan
• Either 'Burn After Reading' director
• Filmmakers' family name
• 'A Serious Man' co-director, 2009
• Producer brothers' surname
• Either director of 2010's 'True Grit'
• Either "Raising Arizona" director
• Joel or Ethan of filmdom
• Either "True Grit" (2010) director