The Bishop of Worcester, the Rt Rev John Inge, has taken his seat in the House of Lords for the first time.
He was flanked by the Archbishop of Canterbury and the Bishop of Birmingham as he swore an oath of allegiance to the Queen.
The archbishops of Canterbury and York and the bishops of London, Durham and Winchester have automatic seats in the Upper House while the remaining 21 lords spiritual are the longest-serving diocesan bishops.
In 2011 he was awarded an honorary doctorate by the University of Worcester.
The 57-year-old is chairman of the board of The College of Evangelists. He serves on the Faith and Order Commission (FAOC) of the General Synod.
He has served on the Council of Ridley Hall College, Cambridge since 2008.