Mumford & Sons proved that they had a sense of humour with their appearance on 'Jimmy Kimmel… Live!' the other night.

The English band, who released their third album 'Wilder Mind' earlier this year, took part in a sketch that was billed as a lost episode of VH1's 'Behind the Music'.

Set in 1998, it portrayed the foursome as a boyband called 'Mumtown' - with Kimmel as their fifth member  - who had songs like 'Girl, I'm Saying Girl, Girl' and 'Package-4-U'.

Watch the spoof documentary below. We reckon there could be a feature-length film in this...