Fox Searchlight has released the full-length trailer for the drama Goodbye Christopher Robin [GBCR] about the origins of 'Winnie the Pooh'. Domhnall Gleeson [DGLEE] stars as author A. A. Milne who is inspired by his son Christopher Robin to write a book to bring joy to children of all ages after the first World War. Goodbye Christopher Robin opens in theaters on October 13th.