Giovanni di Pietro di Bernardone, known as Francis of Assisi, was an Italian mystic and Catholic friar who founded the religious order of the Franciscans. He was inspired to lead a life of poverty as an itinerant preacher. One of the most venerated figures in Christianity, Francis was canonized by Pope Gregory IX on 16 July 1228. He is commonly portrayed wearing a brown habit with a rope tied around his waist, featuring three knots that symbolize the three Franciscan vows of poverty, chastity, and obedience.
Gian Franco Corsi Zeffirelli was an Italian stage and film director, producer, production designer and politician. He was one of the most significant opera and theatre directors of the post–World War II era, gaining both acclaim and notoriety for his lavish stagings of classical works, as well as his film adaptations of the same. A member of the Forza Italia party, he served as the Senator for Catania between 1994 and 2001.
Simon Phillip Hugh Callow is an English actor. Known as a character actor on stage and screen, he has received numerous accolades including an Olivier Award and Screen Actors Guild Award as well as nominations for two BAFTA Awards. He was made a Commander of the Order of the British Empire (CBE) for his services to acting by Queen Elizabeth II in 1999.
Michael York OBE is a British actor. After performing on stage with the Royal National Theatre, he had a breakthrough in films by playing Tybalt in Franco Zeffirelli's Romeo and Juliet (1968). His blond, blue-eyed boyish looks and English upper social class demeanor saw him play leading roles in several major British and Hollywood films of the 1970s. His best known roles include Konrad Ludwig in Something for Everyone (1970), Geoffrey Richter-Douglas in Zeppelin (1971), Brian Roberts in Cabaret (1972), George Conway in Lost Horizon (1973), D'Artagnan in The Three Musketeers and its two sequels, Count Andrenyi in Murder on the Orient Express (1974), and Logan 5 in Logan's Run (1976).
Bruce Robinson is an English actor, director, screenwriter and novelist. He wrote and directed Withnail and I (1987), a film with comic and tragic elements set in London in the late 1960s, which drew on his experiences as a struggling actor, living in poverty in Camden Town.
Nicholas Anthony Phillip Clay was an English actor.
Roy Dotrice was a British actor. He played the antiquarian John Aubrey in the solo play Brief Lives. He won a Tony Award for his performance in the 2000 Broadway revival of A Moon for the Misbegotten, also appearing as Wolfgang Amadeus Mozart's father Leopold in Amadeus (1984), Charles Dickens in Dickens of London (1984), and Jacob Wells/Father in Beauty and the Beast.
The Canticle of the Sun, also known as Canticle of the Creatures and Laudes Creaturarum, is a religious song composed by Saint Francis of Assisi. It was written in an Umbrian dialect of Italian but has since been translated into many languages. It is believed to be the first work of literature written in the Italian language with a known author.
Bradford Dillman was an American actor and author.
Allan Leigh Lawson is an English actor, director and writer.
Brother Sun, Sister Moon is a 1972 film directed by Franco Zeffirelli and starring Graham Faulkner and Judi Bowker. The film is an examination of the life of Saint Francis of Assisi.
Derek Francis was an English comedy and character actor.
Judi Bowker is an English film and television actress.
Candace Glendenning is a retired English actress, known for her work in the horror film genre in the 1970s as a "scream queen". She also had a career in British television throughout the late 60s to early 80s.
Reginald Mills was a British film editor and one-time film director with more than thirty feature film credits. Among his prominent films are The Red Shoes (1948), for which he received his only Academy Award nomination, The Servant (1963), and Romeo and Juliet (1968).
Kenneth Thorne was a British television and film score composer.
David Meyer is an English actor. He is the twin of Anthony Meyer who has often appeared alongside him in film. He is best known for his role as a knife-throwing circus performer and assassin in the 1983 James Bond film Octopussy, for Shakespearean roles such as Hamlet and Ferdinand, and for portraying Isaac Newton on stage. Meyer, as part of Shakespeare's Globe, has appeared in numerous productions on stage in London in recent decades, and in 2017 played Saturn in James Wallace's production of The Woman in the Moon at the Sam Wanamaker Playhouse.
Frank Grimes is an Irish stage and screen actor.
Dickens of London is a 1976 television miniseries from Yorkshire Television based on the life of English novelist Charles Dickens. Both Dickens and his father John were played by British actor Roy Dotrice. The series was written by Wolf Mankowitz and Marc Miller. In the United States, the series was shown in 1977.
"Sister Moon" is a phrase from the 1224 religious poem "Canticle of the Sun" by Francis of Assisi.
You may see Graham Faulkner in Franco Zeffirelli's film Brother Sun, Sister Moon (1972) Here on archive.org 
