Le Jour où la Terre s'arrêta (1951)

Michael Rennie (born August 1909 – June 10, 1971) was an English actor best known for his role as Klaatu in the science fiction classic The Day the Earth Stood Still (1951). He enjoyed a successful career spanning film, television, and theater, gaining fame for his dignified and often authoritative roles.

Patricia Neal (born Patsy Louise Neal; January 20, 1926 – August 8, 2010) was an American actress of stage and screen. She was best known for her roles as World War II widow Helen Benson in The Day the Earth Stood Still (1951), wealthy matron Emily Eustace Failenson in Breakfast at Tiffany's (1961), and middle-aged housekeeper Alma Brown in Hud (1963), for which she won the Academy Award for Best

Billy Gray (born January 13, 1938) is an American actor best known for his role as Bud Anderson on the classic television sitcom *Father Knows Best* (1954–1960). His career spans both film and television, and he became a prominent figure in 1950s and 1960s American entertainment.