"Marvel's The Avengers".. Thor (Chris Hemsworth) and Captain America (Chris Evans) join forces in "Marvel's The Avengers," opening in theaters on May 4, 2012. The Joss Whedon-directed action-adventure is presented by Marvel Studios in association with Paramount Pictures and also stars Robert Downey Jr., Mark Ruffalo, Scarlett Johansson, Jeremy Renner and Samuel L. Jackson. ..© 2011 MVLFFLLC. TM & © 2011 Marvel. All Rights Reserved.