The rumor mill is swirling after photographers spotted all 4 members of the [lastfm link_type="artist_info"]Rolling Stones[/lastfm] exiting a London building earlier this week, indicating a possible 50th anniversary tour could be in the making.

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A photo of Mick Jagger leaving the building in London can be seen here.

Rolling Stone magazine posed the question to Mick Jagger in May regarding a 50th anniversary tour and he snickered.

“I don’t have any announcement to make at the moment. I’m just, uh, ya know…just doing this [SuperHeavy] right now.”

If the rumors are true, it will mark the first time the band has toured together since the Bigger Bang tour ended in August of 2007.

The Rolling Stones at Fenway Park in 2005, “Brown Sugar”