Devilish was first formed in 2001.

The first 2 members we're 12 year old twins Bill(vocals) & Tom(guitar)Kaulitz who before have be preforming with just each other since they we're 9.After putting on a show in their hometown of Magdeburg in 2001, Bill and Tom met 11 year old Gustav Schäfer (drummer) and 14 year old Georg Listing (bass guitar).

In 2003, the group was approached by music producer Peter Hoffmann and were soon after signed with Universal Music Domestic Division in Hamburg. They were then known as 'Tokio Hotel' (Significance: 'Tokio' for the lively and engaging city of Tokyo and 'Hotel' for the band's constant touring around the country).