Nicholas Duncan-Williams is the Presiding Archbishop and General Overseer of Action Chapel International Ministry (ACIM), headquarters in Accra, Ghana.

Known in many parts of the world as the Apostle of Strategic Prayer, Archbishop Duncan-Williams is also the Founder and Chairman of Nicholas Duncan-Williams Ministry (NDWM) formerly known as Prayer Summit International (PSI). NDWM works to advance our God-given mission: delivering the life-changing message of Jesus Christ to our hurting world.