Tony Blair, Dolly Parton and Archbishop Desmond Tutu will discuss how their faith and beliefs have shaped their lives in a new flagship BBC religious programme hosted by Fern Britton.
Actress Sheila Hancock will also appear in the series, which will air in the run-up to Christmas.
Former prime minister Mr Blair, who has been the subject of speculation that he could become president of the European Council, talks during the prog
ramme about the significance of his conversion to Catholicism.
He also explains his aims behind setting up a Faith Foundation to get people from different religions working together.
Country music star and actress Parton tells how she balances her strong religious beliefs with her flirtatious image.
She believes she has proved her Tennessee preacher grandfather - who warned that "a dancing foot and a praying knee don't fit on the same leg" - wrong.
Former This Morning co-host Britton said: "All the interviewees come from very different backgrounds but what binds them together is the fact that, although their faith has been challenged, they've emerged with strong spiritual beliefs."
Nobel Peace Prize winner Archbishop Tutu tells the show that he has always been "a prisoner of hope" but jokes that he would like to ask God: "Whose side are you on?"
Hancock, a Quaker, has lost two husbands to cancer. After the death of her second husband, Inspector Morse star John Thaw, she wrote two "inspiring" books.
The actress, who has recently been treading the boards as Mother Superior in the musical version of Sister Act, once penned her own newspaper headline: "I'm not a dreary cow."
The four one-hour programmes called Fern Britton Meets... will begin on BBC1 in late November.
The channel will also broadcast two Songs Of Praise specials over Christmas - a spectacular from the Royal Albert Hall with Bryn Terfel, Ruby Turner and Jodie Prenger, and another recorded at a church in Jerusalem.
