Rovio's immensely popular Angry Birds video game will come to life on the big screen with The Angry Birds Movie, which hits theaters on May 20. Way back in October 2014, Sony Pictures announced the voice cast, lead by Jason Sudeikis as Red, but today, Entertainment Tonight has revealed a new voice cast member, Oscar-winning actor Sean Penn. The actor has been cast as a massive bird named Terence, who only speaks through grunts and other non-verbal forms of communication, which you can see in a new clip where Terence meets Red.

Terence is introduced to Red and other birds such as Danny McBride's Bomb in an anger management class, run by Matilda (Maya Rudolph). We're not sure how exactly Terence fits into the story, but Sean Penn joins a voice cast that also includes Josh Gad (Chuck), Bill Hader (Leonard), Peter Dinklage (Mighty Eagle) and Kate McKinnon (Stella). The voice cast is rounded out by Keegan Michael Key, Tony Hale, Ike Barinholtz, Hannibal Buress, Cristela Alonzo, Jillian Bell, Danielle Brooks, Grammy nominee and Latin music sensation Romeo Santos, and YouTube stars Smosh (Ian Andrew Hecox and Anthony Padilla), in unspecified roles.

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The Angry Birds Movie takes us to an island populated entirely by happy, flightless birds. Or almost entirely. In this paradise, Red (Jason Sudeikis), a bird with a temper problem, speedy Chuck (Josh Gad), and the volatile Bomb (Danny McBride) have always been outsiders. But when the island is visited by mysterious green piggies, it's up to these unlikely outcasts to figure out what the pigs are up to.

In this hilarious 3D adventure, we'll finally find out why the birds are so angry. The Rovio video game has been downloaded a massive 3 billion times since it launched in 2009, where users shoot a variety of different birds from a huge slingshot, into various structures that house green pigs, known as the Oinks, who have stolen these birds' eggs. Unfortunately, the game is short on back story, and all we know from playing the game is that these birds want their eggs back, and will crash into anything to make that happen. This adaptation will provide a long-awaited origin story, revealing how this rivalry between the birds and the pigs really started.

In addition to this new clip, we also have a photo of Sean Penn in the recording booth, where we can also see various images of Terence in the background. This movie marks Sean Penn's second voice over role, after voicing Mr. Satrapi in the critically-acclaimed animated feature Persepolis. Angry Birds hits theaters on May 20, 2016, going up against Universal's Neighbors 2: Sorority Rising and Warner Bros.' The Nice Guys. Visit ET Online to take a look at this new clip from The Angry Birds Movie, as we get closer and closer to this highly-anticipated animated comedy.

The Angry Birds Movie Sean Penn Photo