Gird your loins, hoard your caffeine, and callus your buttocks, superhero fans. The biggest Marvel movie marathon in history is coming to a theater near you, and it is not messing around.

In celebration of the release of "Avengers: Age of Ultron," AMC theaters have taken it upon themselves to screen every Avengers-related film in the Marvel cinematic universe, back-to-back, starting on April 29, continuing for a full 24 hours, and concluding with a showing of "Age of Ultron" on the evening of April 30.

The lineup includes "The Avengers," obviously, but also all three Iron Man films, both Thor films, both Captain Americas, "Guardians of the Galaxy," and 2008's "The Incredible Hulk" (featuring Edward Norton's one and only appearance as Bruce Banner.)

To see the full schedule and get tickets, click here. And to adequately prepare your butt for the challenge of sitting in a movie theater seat for a full day and then some, your Netflix training binge should begin now.