Nicholas Duncan-Williams (born 12 May 1957) is a Ghanaian religious leader and charismatic preacher, serving as the presiding Archbishop and General Overseer of the Action Chapel International (ACI) Ministry. Headquartered in Accra, Ghana, ACI operates globally with affiliates and branch churches in North America, Europe, and Africa. In 2017, he led the prayer for the United States President-elect and Vice President-elect ahead of the inauguration