Bill Kaulitz (born 1 September 1989), also known mononymously as Billy (stylized as BILLY) for his solo act, is a German singer, songwriter, voice actor, designer, and model. He is best known for his work from 2001 to the present as the lead singer of the band Tokio Hotel.
Bill Kaulitz was born on 1 September 1989 in Leipzig, German Democratic Republic. He has an identical twin brother, Tom, who is older by ten minutes. His parents, Simone Kaulitz and Jörg W., separated when Kaulitz and his brother were seven years old. Simone married Gordon Trümper, the guitarist from the German rock band Fatun on 1 August 2009, after dating for 12 years.