AMC previews (trailers and preshow content) typically last about 20 to 22 minutes before the feature film starts

. Specifically, some sources confirm that AMC previews are exactly 22 minutes long and start a few minutes after the scheduled showtime

. However, the total preshow time including trailers can sometimes vary slightly, ranging from about 20 to 25 minutes depending on the movie and location

. In summary:

• AMC previews are generally around 20 to 22 minutes in length.
• They usually start a few minutes after the posted showtime.
• The feature film begins after this preshow period.

This means when you arrive at the published showtime, you can expect roughly 20-22 minutes of trailers and other preshow material before the movie itself begins