"Based on a true story" is so commonly thrown around it's practically the new "in a world where..." as far as trailer plugs go. But the films on this list really are based on true events or a real person's life story. And they weren't just so-so, they're the best movies based on true stories.
The surge in the popularity of movies based on or inspired by true stories in the last decade is especially staggering. The first feature-length film based on a true story was The Kelly Gang, about Ned Kelly. It was released in 1900. Since then, movies based on true stories are being made with increasing regularity, and each year sees the release of more true story movies. Of course, there are movies based on true events like Apollo 13, but there are also good biopics that give an audience insight into a person's life such as Erin Brockovich and Walk the Line. There are also, occasionally, "true stories" based on highly questionable sources, or ones that play with tired tropes. And sometimes, the movie provides a rosier version of true events, as with The Sound of Music.
The films on this list dove deep, did the research, and created films as honest and true to the facts as possible. Below are the top movies truly based on true stories. Vote up your favorite films on this list, or add a movie you love that was based on a real life story or historical events.