As a type of filmmaking once stereotypically associated with nature shows, it's easy to hear the word documentary and conjure up a picture of the legendary Sir David Attenborough's voice wafting over a scene depicting a pride of lions feeding on a gazelle. However, over time, documentary filmmaking has developed into one of the most hard-hitting and important storytelling mediums of our age.
20 Best Documentaries Narrated by A-List Actors
