Bill Kaulitz

Bill Kaulitz (born 1 September 1989), also known as Billy for his solo project, is a German singer and songwriter. He is best known for his work as the lead vocalist of the pop rock band Tokio Hotel.

Kaulitz was born on 1 September 1989 in Leipzig, East Germany. He has an identical twin brother, Tom, who is older by ten minutes. His parents, Simone Kaulitz and Jörg W., separated when Kaulitz was seven years old. Simone married Gordon Trümper, the guitarist from German rock band Fatun on 1 August 2009, after dating for 12 years.

Kaulitz showed an early interest in singing, as did Tom in playing guitar. Trümper noticed the twins' musical inclinations, and helped the twins to start their own band. According to Kaulitz in several interviews, he and Tom started writing music at the age of seven years.

At the age of 10, the brothers began performing live in Magdeburg near their hometown of Loitsche. They played small shows and while their audiences enjoyed them, they were largely unknown. The band lacked a drummer and bass player and the twins relied on a keyboard to fill in other instrumental sounds.