 Much of the filming, which was completed in December 2008, took place in the Wiltshire town of Bradford on Avon, which was standing in for Malvern, and at Darwin's home, Down House in Kent.The film had its world premiere on 10 September 2009 at the 2009 Toronto International Film Festival as the opening night Gala Presentation, the first non-Canadian film since 1996 to be so honoured.The film was released in the UK on 25 September 2009, in Greece on 15 October 2009, in Japan on 20 October 2009 (Tokyo International Film Festival), in New Zealand on 24 December 2009, in the Netherlands on 7 January 2010, in Belgium on 20 January 2010, and in the US and Canada on 22 January 2010.