JUSTIN Welby officially became Archbishop of Canterbury in a service at St Paul's Cathedral on Monday.
The 57-year-old former Bishop of Durham took on the role in a Confirmation of Election ceremony led by Archbishop of York John Sentamu.
The legal process was overseen by a commission of senior diocesan bishops, and the service included readings, prayers and hymns.
Dr Sentamu, who gave a sermon, said: "Archbishop Justin Welby brings many gifts to the office of Archbishop of Canterbury.
"He has my prayers and my support as he assumes this challenging role in the service of the Church of England and of the Anglican Communion worldwide."
The service marked the wider church's confirmation of Justin Welby's election as Archbishop, which took place at Canterbury Cathedral last month.
The former oil executive was announced as Dr Rowan Williams' replacement in the most senior role in the Church of England in November.
He had been a bishop for just over a year when he was chosen to become Archbishop of Canterbury.
Speaking after the ceremony, the Archbishop reinforced his opposition to the proposed legalisation of gay marriage, an issue upon which MPs voted on Tuesday.
He also faces other controversial topics in his new role, including the consecration of women bishops.
But before he begins his public ministry, the new Archbishop will be inaugurated at an enthronement ceremony at Canterbury Cathedral on Thursday, March 21, which will be broadcast live on the BBC.