After recently announcing that they would be releasing their fourth album in 2013, the members of Alter Bridge have now started working on the new disc.

On Friday (Jan. 4), the band posted the picture on the left of guitarist Mark Tremonti and singer Myles Kennedy in the studio on Facebook with the caption "It begins today." And today (Jan. 7), they stated, "Writing on 'AB4' has begun. Very productive sessions so far!"

The band will try to get in as much work as possible over the next couple of weeks, as both Tremonti and Kennedy will be out on the road very shortly.

Tremonti is heading out with his solo band for a tour of Europe and the United States in February and March, as his latest single 'Wish You Well' starts to heat up rock radio.

Meanwhile, Kennedy will be out on the road with Slash in Europe starting Jan. 31. See the dates here.

The upcoming Alter Bridge album will be the follow-up to 2010's 'ABIII,' which yielded the hit singles 'Isolation' and 'Ghost of Days Gone By.' Tremonti is also working on a new album with Creed.