Hayley Atwell is set to co-star with Ewan McGregor in Disney’s “ Christopher Robin ,” sources tell Variety . “World War Z’s” Marc Forster is directing. “ Christopher Robin ” follows Disney’s ongoing model of taking animated classics from its archives and giving them a live-action spin, centering on Robin ( McGregor ), the little boy from the “Winnie the Pooh” series, who is now all-grown-up and lost all sense of imagination. Pooh and his friends reenter Robin’s life to help him find it once again. Atwell will play Robin’s wife. Brigham Taylor is producing the project. “Hidden Figures” scribe Allison Schroeder is penning the script. Disney has found a reliable strategy in making live-action hits based on characters from its animated IP, with “Beauty and the Beast” most recently garnering big box office numbers. The live-action adaptation of the Oscar-winning 1991 movie is currently the highest-grossing film of the year at both the domestic and worldwide box office. Atwe