Ronald Arbuthnott Knox (17 February 1888 – 24 August 1957) was an English Catholic priest, theologian, author, and radio broadcaster. Educated at Eton and Balliol College, Oxford, where he earned a high reputation as a classicist, Knox was ordained as a priest of the Church of England in 1912. He was a fellow and chaplain of Trinity College, Oxford until he resigned from those positions following his conversion to Catholicism in 1917. Knox became a Catholic priest in 1918, continuing in that capacity his scholarly and literary work.