Lanthimos' feature film career started with the mainstream film My Best Friend where he shared directing credits with Lakis Lazopoulos and was followed by the experimental film Kinetta which premiered at the 2005 Toronto Film Festival. His third feature film Dogtooth won the Prix Un Certain Regard at the 2009 Cannes Film Festival and was nominated for Best Foreign Language Film at the 83rd Academy Awards. In 2010, he acted in and co-produced Attenberg, a Greek drama film directed by Athina Rachel Tsangari. His fourth feature film Alps (2011) won the Osella Award for Best Screenplay at the 68th Venice International Film Festival.