The series focuses on a vicar, played by Tom Hollander, who works in an inner-city church.
According to The Guardian, Dr. Rowan Williams has now described the show as "really rather good".
"[It reveals] something about the continuing commitment of the church to run down and challenging areas," he said. "It also shows us someone who prays honestly."
The Bishop of Buckingham, the Right Rev. Alan Wilson, also congratulated the series on his blog.
"At last the BBC has moved beyond The Vicar of Dibley," he said. "It's a noble enterprise... On a personal and emotional level, Rev. is remarkably surefooted. It brings back vividly for me memories of ten years' urban ministry."
Meanwhile, a spokesperson for the Church of England praised the show's "edgy insight" and thanked it for not using "tired old stereotypes".
Rev.'s co-creator James Wood admitted that he has been "surprised and delighted" by the response to the programme and joked: "We've been getting messages that some vicars find it too painful to watch, which is sort of gratifying."
However, he added that he is unsure whether the show will return for a new series, saying: "Those discussions take place much higher up, among the bishops and archbishops of my world."
Rev. concludes its first series tonight at 10pm on BBC Two.