Just in case you were worried or anything, atmospheric electro-pop trio London Grammar are not, we repeat not, members of the Illuminati.

The conspiracy mill went into overdrive speculating over whether the band had joined the elusive cult, after they posed in front of a giant yellow pyramid sculpture, topped with the all-seeing eye, at Lollapalooza festival in Chicago over the weekend.

They posted the image, seen above, via their Facebook page, only to receive several comments rumouring their connection with the "new world order" group.

Frontwoman Hannah Reid put any such accusations to bed when she tweeted the following:

London Grammar aren’t the only artists to have discussed the Illuminati this week. Katy Perry expressed her desire to join the order in a frankly bizarre conversation with Rolling Stone magazine.

She was already rumoured to be a member following her performance of "Dark Horse" at the Grammys in January.

"If the Illuminati exist, I would like to be invited," she said. "I see all that s**t and I’m like: 'Come on, let me in! I want to be in the club.'"

"It sounds crazy. Weird people on the internet that have nothing to do find, like, strange triangles in your hand motions.

"I guess you’ve made it when they think you’re in the Illuminati," she added. "But I believe in aliens, so if people want to believe in Illuminati, great."

Other famous names frequently touted in Illuminati theorist circles include Jay Z, Kanye West, Beyoncé and Madonna.