Air Chief Marshal Sir Kenneth Brian Boyd Cross, KCB, CBE, DSO, DFC (4 October 1911 – 18 June 2003) was a senior Royal Air Force commander. He played a major role in the RAF during WWII. After the war he went to the Air Ministry as Director of Weapons and then as Director of Operations (Air Defence). He went on to be Air Officer Commanding No. 3 Group in 1956, Air Officer Commanding-in-Chief Bomber Command in 1959 and, following his promotion to air marshal in 1961, Air Officer Commanding-in-Chief Transport Command in 1963.