The French man who wrote the music score for this film was born in 1929. It was produced by Edie Landau.
 The screenplay was not adapted but used directly from O'Neill's play, the music score by Andr Previn, and the cinematography by Boris Kaufman. 
Andr George Previn, KBE ( ; born Andreas Ludwig Priwin; April 6, 1929) is a German-American pianist, conductor, and composer. 
Edie Landau (born Edythe Rudolph, July 15, 1927 - ) is an American film and TV producer and executive, known for such films as "Long Day's Journey Into Night," "The Pawnbroker, , The Chosen" and the fourteen movies of The American Film Theatre, which she produced with her husband Ely A. Landau. 
