'' Oslo , August 31st '' ( ) is a 2011 Norwegian drama film directed by Joachim Trier . It is loosely based on the novel '' Will O ' the Wisp '' by Pierre Drieu La Rochelle . It premiered in the Un Certain Regard section at the 2011 Cannes Film Festival . It won the Best Film and Best Cinematography awards at the 2011 Stockholm International Film Festival , where jury president Whit Stillman called the film " a perfectly painted portrait of a generation " . It received widespread critical acclaim , and was one of three films on the Norwegian shortlist for submissions to the 84th Academy Awards for Best Foreign Language Film
2011 Cannes Film Festival
2011 Cannes Film Festival
Oslo, August 31st