Not a word of the script was changed during production. The film was shot exactly as it was written, word for word.
The film is 127 minutes long and contains only 236 total cuts (including the title card). The average shot length is just over 32 seconds. The film's script doesn't exceed the length of over 60 pages.
Loosely based on personal experiences of director Michael Haneke. His aunt suffered a degenerative disease and the paintings seen in the movie are owned by Haneke's parents.
Existing Cannes Festival rules preclude the possibility of one film winning multiple awards. Hence, Amour won only one single award at Cannes 2012, the Palme D'or, in spite of the jury deeming it worthy of other awards as well. Jury President Nanni Moretti later told director Michael Haneke that had it only been up to him, he would have awarded the film not just the Palme D'or, but Best Actor for Jean-Louis Trintignant, Best Actress for Emmanuelle Riva and Best Director and Best Screenplay to Michael Haneke. Ironically, Michael Haneke himself was responsible for getting the rules changes allowing one film to win only one major award when in 2001, his film The Piano Teacher (2001) won 3 major awards at the Cannes Film Festival of that year - the Grand Jury Prize, Best Actress and Best Actor.
The film was previously titled "These Two" and then "The Music Stops" before one day at lunch, the film's star Jean-Louis Trintignant suggested to director Michael Haneke that since the subject of the film was love, why not call it Amour (French for Love). Michael Haneke thought that the title made sense and worked beautifully so the film was then named Amour.