[12] After Bill Kaulitz participated in a children's Star Search in 2003 at age thirteen (which he lost in the quarter-final), he was discovered by music producer Peter Hoffmann.

These two songs were written by singer Bill Kaulitz and their group of producers Peter Hoffmann, David Jost, Pat Benzer, and Dave Roth.

"Der letzte Tag" contained a B-side called "Wir schließen uns ein", which was also accompanied by a music video.

The first single of their second album Zimmer 483 (Room 483), called "Übers Ende der Welt" (later re-released in English under the name "Ready, Set, Go!

The "1000 Hotels" European Tour began on 3 March 2008 in Brussels and continued through locations including the Netherlands, Luxembourg, France, Spain, Portugal, Italy, Serbia and Scandinavia.

In August 2008 Tokio Hotel embarked on a second tour of North America, including a performance at the Bamboozle festival in New Jersey.

Not long after finishing the "Welcome to Humanoid City Tour", Bill and Tom, with their manager David Jost, moved to Los Angeles and continue to live there.

On 18 May 2012 Far East Movement released an album named "Dirty Bass", featuring the song "If I Die Tomorrow", which includes vocals by Bill.

On 22 January 2014, the band's producer, Peter Hoffman, announced that recording for the new album had been completed and that they were in the process of selecting the track list.

[39] On 3 April, the band informed their fans via Facebook and Twitter about their recent website update, which included an official video teaser of them working on their upcoming album and never-before-seen photos of the members.

On 29 October 2018, the band announced via their official Facebook page that they would be embarking on a new tour in 2019 named "Melancholic Paradise" wherein they would perform both familiar songs and new ones from their then-upcoming album.

In October 2019, Bill Kaulitz announced via his Instagram account that the upcoming Tokio Hotel album had been finished with the recording sessions and that it would be released in 2020.

During a live chat on Spotify, the band confirmed that new versions of "Durch den Monsun" and "Monsoon" would be released some time in Autumn 2020 as a celebration of the single's 15th anniversary.

On 7 December 2020, the band announced via their official Facebook page and Instagram account that they would be embarking on a new tour in Autumn 2021 named "Beyond the World",[49] promoting "Durch den Monsun 2020" and "Monsoon 2020", whilst wishing to perform more songs from their upcoming album.

Via their #AskTokioHotel livestream on Twitter, the band announced a new single called "White Lies", featuring a guest appearance from German EDM duo VIZE.

On 7 February 2021, the band appeared on Super Bowl LV on ProSieben, on which they performed the songs; "When It Rains It Pours", "Covered in Gold", "We Found Us", "What If", "White Lies" and "Stormy Weather".

Instead of the planned date of 28 May 2021, "Behind Blue Eyes" was released on 27 May 2021 to coincide with the band's live performance of the song on ProSieben's Germany's Next Topmodel on the same day.

On 27 August 2021 the band appeared on Spielesause 2021 (the German livestreaming event of Gamescom), where they performed "White Lies", "Behind Blue Eyes" and "Sorry Not Sorry" with Badchieff.

On 22 October 2021 the band performed in the restaurant China Club Berlin to promote the release of "Here Comes the Night", which was played after "White Lies" and "Behind Blue Eyes".

A message written on their official Instagram page reads: "Dear Aliens, we are currently discussing on a daily basis what is appropriate to share and how to carry on with our music.

We're sure everybody understands that we can't pursue our upcoming tour as planned but we can announce today that we have successfully moved a majority of the shows to new dates in 2023.

On 28 April 2022 the band uploaded a "spoiler alert"[52] snippet on their official TikTok account showing the vocals for their new single "When We Were Younger", which was released on 27 May 2022.

On 24 August 2022 the band uploaded a snippet of their new single "Happy People", featuring a guest appearance from Icelandic musician Daði Freyr, to their official YouTube channel.

On 4 November 2023, the band started teasing a potential Christmas song by posting photos of Bill and Tom Kaulitz on a Christmas-themed set on their official Instagram page.

On 7 November 2023, the band released an Amazon Music Original song called "Your Christmas" along with a Behind the Scenes video on their official YouTube account.

On 4 December 2023, the band performed a live concert on Amazon Music DE's official Twitch account, where the songs "White Lies", "Just a Moment" and "Durch den Monsun" were played.

[6][59] On 19 January 2010, lead singer Bill Kaulitz teamed up with twins Dean and Dan Caten of DSquared to walk the runway at a fashion event in Milan.

[64] Kaulitz made two appearances, as he opened and closed DSquared's Menswear Autumn/Winter 2010 show to Tokio Hotel's songs "Scream" and "Screamin'" respectively.

[67] Bill and Tom Kaulitz released an app named "BTK Twins" for Android on 19 December 2011[68] and iOS on 16 January 2012[69] to keep in touch with their fans.

Bill and Tom appeared as jury members on the 10th season of Deutschland sucht den Superstar, which was broadcast from 5 January until 11 May 2013.