Carl Barat said the chemistry with his fellow Libertines frontman Pete Doherty is "pretty electric" as the band prepared to play their first full gig tonight since their bitter break-up in 2004.
The foursome, whose debut Up The Bracket was named the best British album of the past decade in a survey of musicians and industry figures by music magazine NME, play the Kentish Town Forum in north London.
It is the first of a series of comeback gigs which will see Barat, Doherty and bandmates John Hassall and Gary Powell play the Reading and Leeds festivals
Barat told the NME he was "petrified" at the prospect of getting back on stage with his bandmates.
He said: "It's pretty electric the chemistry, it hasn't changed a bit. So, yeah, exciting."
And he refused to write off the possibility of a more-permanent comeback, saying: "It's slow. It's day by day. But I do really think by the time the gigs come round, it'll be just like old times."
The band, whose hits included Don't Look Back Into The Sun, collapsed when Barat fell out with his joint frontman because of Doherty's wayward behaviour as he battled drug problems.
They played some shows without Doherty to promote their final album, but soon called it a day.
Last year Doherty - who has often been in trouble with police over his drug use - claimed the band had been offered millions of pounds to reform.