EXCLUSIVE: CAA has signed Nick Stafford, the playwright who won the 2011 Tony Award for his stage adaptation of the Michael Morpurgo novel War Horse. The play was subsequently turned into the live-action feature by Steven Spielberg. The film opens Christmas. The play opened at London’s National Theatre in 2007, then moved to the West End and is currently on Broadway at the Vivian Beaumont Theatre. Versions of the play will tour the U.S. and open in Toronto. Stafford continues to be repped in the UK by The Agency.