Lon Allison (1952–2019) was director of the Billy Graham Center at Wheaton College in Wheaton, Illinois. He previously directed the evangelism and prayer division for the Evangelical Covenant Church and planted two churches focused on reaching pre-Christian and nonchurched people. Allison's books include John R. Mott: That the World May Believe and Billy Graham: An Ordinary Man and His Extraordinary God.

Read Christianity Today's memorial tribute to his life and ministry.