The band, who rose to fame after being formed on US reality show Making The Band in 2000, will be performing at their first UK show in over a decade next month.
In a new photo shoot, Trevor Penick, Jacob Underwood, Erik-Michael Estrada and Dan Miller look almost unrecognisable as they unveil their new image.
'Liquid Dreams' hitmakers O-Town announced their decision to reunite as a band after a 10-year hiatus last month.
The band are reuniting without frontman Ashley Parker Angel, who has since continued to carve out a solo career and has also taken up small acting roles.
The singers explained that their reunion has enabled them to "re-identify" themselves. They said: "We're essentially a brand new group. This time is different clearly for one reason: there's no big manager, there's no big label, there's no big networks, there's no big music mogul. It's just us and our love for music."
O-Town will be playing an intimate gig at Under the Bridge in London on 13 June. The group are expected to play their old hits and some new songs.
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Watch the boys behind the scenes on their photo shoot in the video below: