Who writes coldplays songs?

Coldplay's songs are primarily written by the band's lead singer, Chris Martin. He often collaborates with Jonny Buckland, the band's lead guitarist, to compose the music and lyrics. Other members of the band, including Guy Berryman (bassist), Will Champion (drummer), and Phil Harvey (creative director), may also contribute to the songwriting process. Coldplay has also worked with external producers and songwriters on occasion, such as Brian Eno and Stargate.