So to celebrate its big day – and because trivia really is one of our favourite things – here are ten things you probably didn’t know about The Sound of Music.
1. Christopher Plummer didn’t like the film
The film is beloved by generations of film fans, but one major Sound of Music naysayer? Christopher Plummer, one of the classic's biggest stars. The man who became famous for playing Mr. Von Trapp referred to the film as "The Sound of Mucus" whilst on set.