RANKED: The 21 best heist movies ever

There's something about a good heist movie that makes a moviegoing experience perfect. From the high stakes to the top-shelf actors and directors who seem to gravitate to the genre, when it's done right, it can be a thrilling cinematic experience.

With this week's "Triple 9" about dirty cops involved in, yes, a heist (starring Woody Harrelson, Aaron Paul, Kate Winslet, and Casey Affleck), we thought it would be a good time to look back on classics in the genre.

Here are the 21 best heist movies of all time, ranked.