<Li> Bradley Cooper as Rocket : A genetically engineered raccoon - like bounty hunter and mercenary who is a master of weapons and battle tactics . Gunn worked with live raccoons to get the correct feel for the character , and to make sure it was `` not a cartoon character '' , saying , `` It 's not Bugs Bunny in the middle of the Avengers , it 's a real , little , somewhat mangled beast that 's alone . There 's no one else in the universe quite like him , he 's been created by these guys to be a mean - ass fighting machine . '' Gunn also based the character on himself . Describing Rocket in relation to the rest of the Guardians , Cooper said , `` I think Rocket is dynamic . He 's the sort of Joe Pesci in Goodfellas guy . '' Cooper voiced Rocket , while Sean Gunn ( James ' younger brother ) stood in for the character during filming . James Gunn said that for the role of Rocket , some physical movement from Cooper , including facial expressions and hand movements , was recorded as potential reference for the animators , though much of Sean Gunn 's acting is used throughout the film . Before Cooper was cast , James Gunn said that it was a challenge finding a voice for Rocket , that he was looking for someone that could balance `` the fast - talking speech patterns that Rocket has , but also can be funny , because he is really funny . But also has the heart that Rocket has . Because there are actually some pretty dramatic scenes with Rocket . '' </Li>
<Li> Bradley Cooper as Rocket : A genetically engineered raccoon - like bounty hunter and mercenary who is a master of weapons and battle tactics . Gunn worked with live raccoons to get the correct feel for the character , and to make sure it was `` not a cartoon character '' , saying , `` It 's not Bugs Bunny in the middle of the Avengers , it 's a real , little , somewhat mangled beast that 's alone . There 's no one else in the universe quite like him , he 's been created by these guys to be a mean - ass fighting machine . '' Gunn also based the character on himself . Describing Rocket in relation to the rest of the Guardians , Cooper said , `` I think Rocket is dynamic . He 's the sort of Joe Pesci in Goodfellas guy . '' Cooper voiced Rocket , while Sean Gunn ( James ' younger brother ) stood in for the character during filming . James Gunn said that for the role of Rocket , some physical movement from Cooper , including facial expressions and hand movements , was recorded as potential reference for the animators , though much of Sean Gunn 's acting is used throughout the film . Before Cooper was cast , James Gunn said that it was a challenge finding a voice for Rocket , that he was looking for someone that could balance `` the fast - talking speech patterns that Rocket has , but also can be funny , because he is really funny . But also has the heart that Rocket has . Because there are actually some pretty dramatic scenes with Rocket . '' </Li>
who played the fox in guardians of the galaxy
who played the fox in guardians of the galaxy
Bradley Cooper
Bradley Cooper