Big Brother 13 is the thirteenth season of various versions of Big Brother and may refer to:
Big Brother 13 (U.S.), the 2011 edition of the U.S. version of Big Brother Gran Hermano 13 (Spain), the 2012 edition of the Spain version of Big Brother Big Brother 13 (UK), the 2012 edition of the UK version of Big Brother Big Brother Brasil 13, the 2013 edition of the Brazil version of Big Brother Bigg Boss 13, thirteenth season of Big Brother in India in Hindi
See also Big Brother (franchise) Big Brother (disambiguation)