With Marvel film "Guardians of the Galaxy" filming at Shepperton Studios in England, the cast has been unveiled to include powerhouse names like Zoe Saldana and Benicio del Toro, and relative newcomers like Karen Gillan and Chris Pratt. With "Guardians of the Galaxy" preparing for its release August 1, 2014, take a look at its incredible cast list, as well as their respective roles in "Guardians of the Galaxy."