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.