File photo dated 14/7/2002 of Oscar-winner Diane Keaton who has signed up to play a nun opposite Jude Law in a new drama about a fictional pope. PRESS ASSOCIATION Photo. Issue date: Tuesday July 28, 2015. Keaton, who won the best actress Oscar in 1977 for Annie Hall, will play Sister Mary in the eight-part series The Young Pope. The show, directed by Italian filmmaker Paolo Sorrentino, is the story of the fictional, American-born Pope Pius XIII played by Law. See PA story SHOWBIZ Keaton. Photo credit should read: Branimir Kvartuc/PA Wire