We’ve heard from trusted sources that Rovio will be announcing the PC version of their Angry Birds game tomorrow at an invite-only press event with Elisa, a Finnish operator. Few invites have been sent, but the event will be webcasted internationally as well. It is unclear at the moment if it will be a public webcast, but most unlikely.

Rovio has been on a roll recently and well on their way through the Tetris strategy that the company disclosed earlier this year. Just yesterday, CEO Mikael Hed, announced in LeWeb that they have had more than 42 million downloads of the game, of which 12 million have been paid ones on the iOS platform.

We’ll be on the lookout for the release tomorrow and report as things progress.