Revd Mark Poulson will be responsible for enhancing relationships with other world religions as he replaces Revd Canon Toby Howarth who is now Bishop of Bradford.
He has been Vicar of St John's Church, Southall for the last 11 years and it's thought he was chosen because of his experiences there.
Southall is a diverse area of West London with existing relationships across different faiths and communities.
He has also been involved in the Church of England's Presence and Engagement Programme as a long-standing member of its Task Group, and sits on the Board of the Church's partnership with Government, the Near Neighbours Project.
The Archbishop of Canterbury Justin Welby said: "I am absolutely delighted that Mark is taking on this role. Bishop Toby Howarth has exercised an extraordinary ministry in difficult times for inter faith relations.
"His appointment as Bishop of Bradford was as much a loss for Lambeth as it is a remarkable gain for them. Mark is one of the rare people who could fill Toby's shoes.
"I was very pleased when the appointing panel recommended him. We are very grateful to his parish, and to the Area Bishop of Willesden for releasing him quickly and generously."
Revd Poulson said: "I am enormously excited by the opportunity to serve both the Archbishop and the wider church in the field of inter-religious relations, building on the work of my predecessors in enabling the national church to be confident and sensitive in its ministry and mission in an increasingly complex multi-religious world context."