Cooper on board for superhero epic.

Rocket Raccoon has finally found his voice! Academy Award-nominated actor Bradley Cooper has officially joined the cast of Marvel’s ‘Guardians of the Galaxy,’ lending his voice to the fan-favourite raccoon that will join Peter Quill (Chris Pratt), Gamora (Zoe Saldana) and Drax (Dave Bautista) on their epic adventure.

Cooper has previously starred in ‘Silver Linings Playbook,’ for which he was nominated for an Oscar, ‘Limitless,’ ‘Place Beyond the Pines’ and the ‘Hangover’ trilogy, the latter of which has grossed $1.4 billion globally. He will next be seen in ‘American Hustle’ which will reunite him with ‘Silver Linings Playbook’ director David O. Russell and co-star Jennifer Lawrence. ‘Guardians of the Galaxy’ will mark Cooper’s first voiceover work.

In the far reaches of the Marvel Cinematic Universe, an unlikely cast of characters including Peter Quill, Gamora, Drax, Groot and Rocket Raccoon must join forces to defeat a cosmic force of epic proportions.

Directed by James Gunn, the live-action ‘Guardians of the Galaxy’ will take fans to new corners of the Marvel Universe when it hits theatres in August 2014.