Angry Birds is Rovio's biggest product, by far, so it is natural to see the company pushing the brand in multiple directions. One direction includes the band Green Day and the Facebook Angry Birds Friends game.

"We had been looking to give the pigs a more prominent roles in the games, and when we started talking to Warner and Green Day management, we realised it was a very good fit," Angry Birds marketing head Peter Vesterbacka said to The Guardian.

The "Green Day episode," UK newspaper The Guardian reported, is available to play now. It feature 10 levels and three band members from Green Day (Billie Joe Armstrong, Mike Dirnt, and Trey Cool) along with the band's new single, "Oh Love," and an exclusive track called "Troublemaker."

Levels and music will continue to be released following the band's release of the Uno, Dos, and Tre albums over the next 4 months, and the partners have hinted at the partnership moving outside of the world's biggest social network.

"Our fans and Green Day fans should expect more of the same surprise and delight," Vesterbacka said.

While this may seem a one-way deal for Rovio, Vesterbacka is keen to stress it is an introduction to both Green Day and Angry Birds for their respective fans. He also emphasized Green Day's 75 million albums sold and 25 million likes on Facebook.

Provided that Rovio still wants to be bigger than Disney, similar cross-promotion material like this may be needed.

"We have been contacted by a lot of different music artists for areas like co-promotions, and we have talked to a lot of labels," said Vesterbacka.

Rovio recently announced it is to bring a new Angry Birds season update, themed around going back to school, as a pink Angry Birds is introduced that can blow bubbles. Angry Birds Seasons is a regular expansion pack for the title, while Angry Birds Space released earlier in 2012 as a full-fledged sequel.