Photo provided by DML

Even though Iceland's Of Monsters and Men are only two weeks into their first U.S. tour, it's not too early to predict that they will be the Mumford & Sons of this year.

In fact, during their 80-minute sold-out performance Thursday night at the Fine Line, Of Monsters and Men sounded like a cross between Mumford & Sons and Arcade Fire. Like Arcade Fire, OMAM has female and male co-lead singers, who often alternate couplets in a song. Like Mumford & Sons, OMAM favors folk-rock with a simple beat and an Irish flavor.

OMAM has an accordionist/keyboardist, trumpeter, two acoustic guitarits (the lead singers), electric guitarist, bassist and drummer, whose primitive approach helps define the band's sound. But what sets this Icelandic sextet apart are the vocalists. Not only do they trade vocals a la Swell Season, but they have gorgeous voices. Stocky, bearded Ragnar "Raggi" Þórhallsson may look like he stepped out of Bon Iver but he sounds like David Gray. Wearing a bulky patterned sweater with her raven hair in a bun, Nanna Bryndís Hilmarsdóttir could have passed for Bjork's hippieish younger sister but her rich, whiskey-soaked voice sounded like a female version of Marcus Mumford with an alluring vibrato.

The sextet (augmented by a female trumpeter) offered eight of the 11 tracks on its Icelandic debut, "My Head Is An Animal," which will be released Tuesday in the United States. Of course, the highlight was the dreamy, surging single "Little Talks," fueled by Mighty Mighty Bosstones-like trumpet, that had the full house at the Fine Line dancing like an aerobics class. There's an undeniable spiritual quality to OMAM's music but no one can resist the unbridled joy of tunes like "Lakehouse," the night's finale.

Here is the Fine Line set list:

Dirty Paws/ From Finner/ Beneath My Bed/ Slow and Steady/ Mountain Sound/ King and Lionheart/ Love Love Love/ Close to Me/ Little Talks/ Six Weeks ENCORE Your Bones/ Lakehouse