Wilmer X is a Swedish rock band. Originally formed in 1977-1978 as Wilmer Pitt in Malmo, Sweden by Nisse Hellberg （guitar and vocals） and Jalle Lorensson （harmonica）， the band was rebranded as Wilmer X at the time of the first recording. 　　Wilmer X achieved their nationwide commercial breakthrough in 1988 with the 《LP Teknikens Under》， the similarly entitled title track becoming a chart topper. As of date, Wilmer X has recorded more than eighteen studio albums during a career that spans thirty years. 　　Nils Hellberg （born in Limhamn, Malmo on 2 April 1959） is a Swedish composer, lyricist, singer, musician, guitarist and frontman of the band Wilmer X and its co-founder with Jalle Lorensson. Besides his work with Wilmer X, he has released materials independent of the band. 　　In 1995, he was part of a fictitious 1960s rock band called The Lonely Boys where he assumed the name Richard Andersson and where he played lead guitar, harmonica, maraccas, tambourine and vocals. 　　He was joined by Per Gessle （known as Thomas Nyberg）， Lasse Goransson （Thomas Holst）， Roland Bergstrom （MP Persson） and Kalle Johansson （Micke Syd Andersson）。 The band and its songs were based on De ensamma pojkarna （Swedish for The Lonely Boys） by the Swedish author Mats Olsson about a young rhythm'n'pop band from the south of Sweden in 1965. 　　In collaboration with Peps Persson, he released the album Roster fran sodern （Voices from the South）。 In 2007 and 2008 he toured throughout Sweden with his solo material and in May 2008, was the solo opening act for John Fogerty. 　　With Clas Rosenberg, he published the Swedish comic book series Herman Frid in 1981. 　　In 2014, he returned with a major solo album Vad har han i huvudet? released on Metronome label on 21 May 2014.