It has been confirmed by a few sources that one of the opening bands for the UK tour will include Los Angeles indie rockers, Prima Donna. You can take a look at their Myspace page to listen to some of their music.

You may already know lead guitarist and singer of Prima Donna, Kevin Preston, from the Green Day alter-ego side project, the Foxboro Hottubs. Since the two bands are touring together it makes you wonder if the Foxboro Hottubs will be making a UK performance.

[+]Update 9:00pm EDT: It has been confirmed by GreenDay.com that Prima Donna will play with Green Day for all of their UK and Europe shows!