| Country | Date | |
|---|---|---|
| Canada | 12 September 2006 | (Toronto Film Festival) |
| France | 19 November 2006 | (Arras Film Festival) |
| Italy | 6 December 2006 | |
| France | 9 December 2006 | (Marrakech International Film Festival) |
| France | 20 December 2006 | |
| Belgium | 27 December 2006 | |
| Hong Kong | 31 March 2007 | (Hong Kong International Film Festival) |
| USA | 28 April 2007 | (Tribeca Film Festival) |
| South Korea | 3 May 2007 | |
| UK | 11 May 2007 | |
| Australia | 24 May 2007 | |
| Spain | 29 June 2007 | |
| Greece | 12 July 2007 | |
| USA | 13 July 2007 | (limited) |
| Poland | 10 August 2007 | |
| Thailand | 10 August 2007 | |
| Denmark | 22 September 2007 | (Copenhagen International Film Festival) |
| Colombia | 28 September 2007 | |
| Mexico | 7 October 2007 | (Morelia Film Festival) |
| Sweden | 12 October 2007 | |
| Russia | 15 November 2007 | (limited) |
| Germany | 6 December 2007 | |
| Argentina | 3 January 2008 | |
| Mexico | 18 January 2008 | |
| Hungary | 27 March 2008 | |
| Israel | 3 April 2008 | |
| Finland | 14 May 2008 | (DVD premiere) |
| Mi mejor amigo | Argentina / Mexico |
| My Best Friend | Finland / International (English title) |
| Kollitos mou, O | Greece |
| Mein bester Freund | Germany |
| Meu Melhor Amigo | Brazil (festival title) |
| Min bäste vän | Sweden |
| Mio migliore amico, Il | Italy |
| Van barátod? | Hungary |
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