Chaplain to the Speaker of the House of Commons, also known as the Speaker's Chaplain, is a Church of England priest who officiates at services held at the Palace of Westminster and its associated chapel, St Mary Undercroft. They also act as chaplain to the Speaker and Members of Parliament. The first Speaker's Chaplain was appointed in 1660. From 1972 to 2010, the Speaker's Chaplain also held the position of Rector of St Margaret's, Westminster.