Jeremy John Heywood, Baron Heywood of Whitehall, GCB, CVO (31 December 1961 – 4 November 2018) was a British civil servant who served as Cabinet Secretary to David Cameron and Theresa May from 2012 to 2018 and Head of the Home Civil Service from 2014 to 2018. He served as the Principal Private Secretary to Prime Ministers Tony Blair and Gordon Brown from 1999 to 2003 and 2008 to 2010. He also served as Downing Street Chief of Staff and the first Downing Street Permanent Secretary. After he was diagnosed with lung cancer, he took a leave of absence from June 2018, and retired on health grounds on 24 October 2018, receiving a life peerage; he died two weeks later on 4 November 2018.