Pendulum is an Australian electronic rock band founded in 2002. Pendulum originally formed in the city of Perth, Western Australia, by Rob Swire, Gareth McGrillen and Paul "El Hornet" Harding. The band was later expanded to include members Ben Mount, Peredur ap Gwynedd and KJ Sawka. Members Swire and McGrillen also formed the electro house duo Knife Party. The group is notable for its distinctive sound, mixing electronic music with hard rock and covering a wide range of genres.
In 2003, Swire, McGrillen and Harding relocated to the United Kingdom. The debut studio album, Hold Your Colour, was released in 2005 to positive critical reception. While Hold Your Colour was mostly of the drum & bass genre, the succeeding albums In Silico and Immersion saw experimentation of other genres such as industrial rock and electronic rock.