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-favorite 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, The 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. 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 theaters August 1, 2014, but in the meantime stay tuned to Marvel.com for the latest news as it breaks, including official casting, first looks and more!

In addition to Guardians of the Galaxy, Marvel Studios will release a slate of films based on the Marvel characters including Thor: The Dark World on November 8; Captain America: The Winter Soldier on April 4, 2014; The Avengers: Age of Ultron on May 1, 2015; and Ant-Man on November 6, 2015.