The film debuted on the first day of the Cannes Film Festival in May 2007 . At Cannes , IFC Films purchased distribution rights for the United States . After the festival , distribution rights for 60 countries had been sold . In September 2007 , it competed at the San Sebastián International Film Festival . That month , it also screened at the 2007 Toronto International Film Festival
Cannes Film Festival
2007 Cannes Film Festival
4 Months, 3 Weeks and 2 Days