Norris Dewar McWhirter, CBE (August 12 1925 – April 19 2004) was a writer, political activist, co-founder of the Freedom Association, and a television presenter. He and his identical twin brother, Ross McWhirter, were known internationally for the Guinness Book of Records, a book they wrote and annually updated together between 1955 and 1975. After Ross McWhirter's assassination by the PIRA, Norris McWhirter carried on alone as editor.