Green Day may have new music on the way.
The band was in London at some point this year, and have shared a teaser video from their time there.
The video shows footage of Billie Joe Armstrong, Mike Dirnt and Tré Cool playing what is presumably a new song.
The video also flashes the year 1972, which is when all three of the band members were born.
What band are you waiting for new music from?
