Bishop Alan Williams SM (born on 15th March 1951) is an English Roman catholic Prelate and 7th Bishop of Brentwood Diocese. He is a member of the Marist Order. He previously served as Parish Priest at St Lawrence of Canterbury, Sidcup and as Chaplain to Sheffield Hallam University. He is a former Superior of the Marist Fathers in England, a post he held from 2000-2008 and has also served as a school teacher and chaplain.