Big Brother 1 or Big Brother (season 1) is the first season of various versions of Big Brother and may refer to:

• Big Brother (Albanian season 1), the 2008 Albanian edition of Big Brother
• Big Brother (Australian season 1), the 2001 Australian edition of Big Brother
• Big Brother (British series 1), the 2000 UK edition of Big Brother
• Big Brother (Croatian season 1), the 2004 Croatian edition of Big Brother
• Big Brother (Dutch season 1), the 1999 Dutch edition of Big Brother
• Big Brother (Finnish season 1), the 2005 edition of Big Brother in Finland
• Big Brother (German season 1), the 2000 German edition of Big Brother
• Big Brother (Greek season 1), the 2001 Greek edition of Big Brother
• Big Brother (Israeli season 1), the 2008 edition of Big Brother in Israel
• Big Brother (Serbian season 1), the 2006 edition of Big Brother in Serbia, Bosnia and Herzegovina, and Montenegro
• Big Brother (Slovenian season 1), the 2007 Slovenian edition of Big Brother
• Big Brother 1 (American season), the 2000 U.S. season of Big Brother
• Big Brother 1 (Bulgarian season), the 2004-2005 Bulgarian edition of Big Brother
• Big Brother 1 (Romania), the 2003 Romanian edition of Big Brother
• Big Brother 1 (Indonesia), the 2011 season of Big Brother in Indonesia
• Big Brother 1 (Ukraine), the 2011 edition of Big Brother in Ukraine
• Big Brother Africa (season 1), the 2003 African edition of Big Brother
• Big Brother Canada (season 1), the English-Canadian 2013 edition of Big Brother
• Big Brother Thailand (season 1), the 2005 Thai edition of Big Brother
• Big Brother Brasil 1, the 2002 Brazilian edition of Big Brother
• Pinoy Big Brother: Season 1, the 2005 edition of Big Brother in the Philippines

• Big Brother Angola: Tesouro, the 2014 Angolan edition of Big Brother
• Bigg Boss 1 (disambiguation)
  • Bigg Boss (Hindi season 1), the 2006-2007 edition of Big Brother in India
    • Bigg Boss OTT (Hindi season 1), season one of the internet version of the show
    • Bigg Boss Halla Bol, a spinoff of season 8 of the show
  • Bigg Boss (Bangla season 1), first season of Big Brother in India in Bengali
  • Bigg Boss Kannada (season 1), first season of Big Brother in India in Kannada
    • Bigg Boss OTT Kannada (season 1), internet version of the show
  • Bigg Boss (Malayalam season 1), first season of Big Brother in India in Malayalam
  • Bigg Boss Marathi (season 1), first season of Big Brother in India in Marathi
  • Bigg Boss (Tamil season 1), first season of Big Brother in India in Tamil
    • Bigg Boss Ultimate (season 1), internet version of the show
  • Bigg Boss (Telugu season 1), first season of Big Brother in India in Telugu
    • Bigg Boss Non-Stop (season 1), internet version of the show
• Gran Hermano (Argentine season 1), the first 2001 Argentinian edition of Big Brother
• Gran Hermano (Spanish season 1), the 2000 edition of Big Brother in Spain
• Grande Fratello (season 1), the 2000 edition of Big Brother in Italy
• Loft Story (Canadian TV series)#Season 1, the French-Canadian 2003 edition of Big Brother
• Secret Story (French season 1), the 2007 edition of Big Brother in France
• Secret Story 1 (French season), the 2010 edition of Big Brother in Portugal
• Velký Bratr, the 2005 Czech edition of Big Brother

This disambiguation page lists articles associated with the title Big Brother 1.
If an internal link led you here, you may wish to change the link to point directly to the intended article.