Good news Angry Birds fans - if you've already forked out (well, parted with 59p at least) for the Angry Birds Halloween title, then you won't have to pay diddly-squat for the Christmas edition of the game, as it's coming as a free update.

The news was confirmed by the developers (@RovioMobile) on Twitter, and indicates that the spin-off version could go the way of Lima Sky's Doodle Jump, which receives regular free updates to tie in with events and seasons.

The Twitter stream also hints at a few more exciting developments for the Angry Birds title, with Rovio being quite open in its responses to fans' tweets.

It states that Palm updates are coming for Pre users, and that "everything is possible", when asked if a Windows Phone 7 version was on the cards.

We're expecting the Angry Birds Christmas edition to land around 11 December, although as of yet there has still been no official confirmation.

Angry Birds Christmas edition screenshots emerge