It's a bit of a change from their humble beginnings in Las Vegas, the hometown of lead singer Dan Reynolds, who convinced Sermon, along with bassist Ben McKee and drummer Daniel Platzman, to move there and start the band.
"I met Dan through a friend and it was just one of those things. We ended up having a jam, talked about our musical influences, what we wanted to do with music, and felt like it'd be cool to start a band together. So we all sort of blindly moved to Las Vegas."
It's not a city that usually comes to mind as a musical hotbed for up-and-coming bands, but it worked a treat for Imagine Dragons.
It gave them the space to grow and the opportunity to play hundreds of gigs, sometimes for six hours at a time - helping them hone their technical skills and stage presence, and figure out how to win over a crowd of ambivalent gamblers.
"Las Vegas is one of the few places left where you can get on a stage and play for hours, and get paid, even if it's only a little bit. And in all those hours, pretty much everything that can go wrong does go wrong - amps blow up, people pass out or someone throws beer all over your gear, but you learn what to do when things don't go perfectly, which is important, because they seldom do."
It's not the life that Sermon had been imagining for himself. Along with McKee and Platzman, he went to Berklee College of Music in Boston when he finished school and studied jazz. "I listened to rock and pop music a lot growing up - I loved it - but when I went to Berklee I really fell pretty hard into jazz. I thought I was going to be a jazz composer and jazz guitarist, and was going to travel the world that way hopefully.
"But, I guess my over-arching want was to play music in whatever form that might take, so I never said no to any opportunities, and Dan sort of struck me - pretty instantly, within the first couple of shows - that he was a great frontman. You can tell pretty quickly if they have that ability to captivate an audience and when I saw it in him, that was exciting."
Sermon sees their different backgrounds (he grew up in Utah, Platzman is from Atlanta and McKee is from small-town Northern California) and different tastes as a key part of their success, too.
"It's surprising how well we all get along considering how different our environments were growing up, but those differences really make us stronger. I think if we all thought the same things, listened to the same music, had the same outlook, the band wouldn't be this good. All four of us are stronger than any one of us, and that's probably true of any band that's been able to last, and withstand the tough times."
Who: Imagine Dragons
What: Latest album Night Visions
Where and when: Powerstation, Tuesday, October 15
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- TimeOut