Victor Mallet was born, 9 April 1893, the son of Sir Bernard Mallet and Marie Adeane. He was educated at Winchester College, 1906-11, and Balliol College, Oxford, 1911-14, BA, 1919. He married Christiana Jean Andreae, 1925, with whom he had three sons and one daughter.

He served with the Cambridgeshire Regiment in France and Ireland, 1914-18. He joined the Diplomatic Service and held various posts in Tehran, Persia (later Iran), 1919-22 and 1933-5; Buenos Aires, Argentina, 1926-8; Brussels, Belgium, 1929-32; Washington, United States, 1936-9; and in the Foreign Office, 1922-6 and 1932. He was Minister in Stockholm, Sweden, 1940-5, and Ambassador to Spain, 1945-6, and Italy, 1947-53. He retired to Wittersham, Kent, 1954. He died, 18 May 1969.

He was awarded the CMG, 1934; KCMG, 1944; and GCMG, 1952.

His publications include: "Life with Queen Victoria" (1968).