Big Brother 9 is the ninth season of various versions of Big Brother and may refer to:

• Gran Hermano Spain (season 9), the 2007 Spanish edition of Big Brother
• Big Brother 9 (UK), the 2008 edition of Big Brother UK
• Big Brother 9 (U.S.), the 2008 edition of Big Brother U.S.
• Big Brother Germany (season 9), the 2008–2009 edition of Big Brother Germany
• Grande Fratello (season 9), the 2009 Italian edition of Big Brother
• Big Brother Brasil 9, the 2009 edition of Big Brother Brasil
• Big Brother 9 (Australia), the 2012 edition of Big Brother Australia
• Big Brother 2014 (Finland), the 2014 edition of Big Brother in Finland
• Big Brother Africa 9, the 2014 edition of the African version
• Bigg Boss 9 (disambiguation)
  • Bigg Boss 9, ninth season of Big Brother in India in Hindi
  • Bigg Boss Kannada (season 9), ninth season of Big Brother in India in Kannada

• Big Brother (franchise)
• Big Brother (disambiguation)

This disambiguation page lists articles associated with the title Big Brother 9.
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