Rock singer Pete Doherty has performed live with former bandmate Carl Barat for the first time since their group The Libertines split up in 2004.
Barat (left) and Doherty continued to play for fans backstage
The pair played 13 songs together during Doherty's gig at London's Hackney Empire on Thursday.
NME reporter Priya Elan described their set as a "momentous occasion".
But Barat's spokesman Tony Linkin said it was just a one-off: "They just got together for the night. There are no plans for anything more than that."
The pair were busy with their own bands, he added. "Babyshambles are doing their own thing and Dirty Pretty Things are doing what they are doing."
Recently, however, Barat said: "We're not doing very different things but at some point I'd be happy to work with Pete. Our relationship hasn't really faded away."
The pair whispered and hugged each other in between songs, and Doherty occasionally helped Barat out with the words.
"There was a very strong sense that they are still friends and that will never go away. I think that is what some of the fans tapped into," he said.
"It didn't feel cynical like a lot of reunions do, it felt quite natural."
Speaking to BBC Radio 1, Doherty fan Daisy said: "They seemed really happy - they were smiling and hugging each other."
The set included Libertines classics such as What Katie Did and Time For Heroes.
Doherty teased fans about Barat's surprise performance
After the gig, Doherty and Barat went backstage to play an acoustic set with the windows open.
Hundreds of fans stood outside listening, which Mr Elan claimed was very much "in the spirit of the band".
The couple's fall-out has never been fully explained, although Doherty was jailed in 2003 after breaking into Barat's flat and stealing some of his belongings.
On his release from prison, he rejoined the band, but the reconciliation was fraught with arguments and continuing drug problems.
The group played their final gig at the end of 2004 in Paris.