The two One Direction members and the 'Somewhere Only We Know' hitmaker have penned the song 'Adeline' which has been registered under their names.
According to The Sun newspaper, a source said: ''Liam, Louis and Tim met up for a secret writing session last year.''
However, Liam and Louis are not planning on singing it themselves and are instead hoping to give it to a new artist.
The source continued: ''The song won't be used by One Direction but there's a good chance Louis could give it to one of the artists signed to his new record label.''
Speaking about the band's world tour, 21-year-old Harry teased a ''new identity'' for the group.
He told Entertainment Weekly: ''We're currently recording and writing our next album, so we'll be working on that. The songs are coming together quickly, so we're buzzing with the new stuff.
''It carries a slightly new identity, but I think it's an obvious change from ('Four') in a positive way. We've branched out and worked with different writers, and we've got some great songs!''
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