This November, the teen favourites will leave behind their home country and two bandmates to join their producer David Jost in Beverly Hills, California, daily Bild reported.
There, the singer and guitarist plan to write new songs, the paper said.
“Yes, Bill and Tom will be moving to Los Angeles, but they will maintain a home in Germany,” Jost told the paper.
The other two band members, 23-year-old bassist Georg Listing and 22-year old drummer Gustav Schäfer, will stay behind in Germany because they want to remain with their girlfriends.
Bild speculated that a recent break-in at their Hamburg home and stalking by adoring fans could be behind the move.
The Kaulitz twins started Tokio Hotel, along with Listing and Schäfer, in their hometown of Magdeburg, bursting onto the music scene with their first album "Schrei" (Scream) in May 2006. It sold about 600,000 copies in its first week and went on to become a major success in France, Austria and Switzerland. The band's first US single was released in late 2007.
According to Bild, the quartet has sold 8 million albums worldwide, and reached the top five in the charts of 15 countries with their latest DVD and live album “Humanoid City.”