Coldplay were the musical guest on last night's The Late Show with Stephen Colbert, and Chris Martin proved that he had a sense of humour by taking part in a segment that saw his share his songwriting 'expertise' with the show's host.

The band's frontman participated in a skit that saw him write 'lyrics' for the show's instrumental theme in his dressing room, while a confused Colbert amusingly looked on.

Come to think of it, maybe it wasn't a skit, after all. You never know with Coldplay.

Watch it below: