Tina Turner to tie the knot with boyfriend of 26 years

Tina Turner is reportedly getting married.

The 75-year-old singer is set to wed her boyfriend, 57-year-old Erwin Bach - who she has been in a relationship with for 26 years - in Switzerland on July 21 at their chateau on the shore of Lake Zurich.

'Simply The Best' singer Tina is expected to wear an Armani gown and guests - including designer Giorgio Armani - have been asked to wear white in keeping with the theme of the ceremony.

According to reports, the pair also intend to throw a wedding party at their villa on the French Riviera at a later date.

The couple have been dating since 1987 and met when Erwin - who is from Germany - was working as a record producer at EMI. They have been living in Zurich since 1995.

American musician Tina - who was previously married to Ike Turner who she split from in 1976 because of his abusive behaviour - applied for Swiss citizenship in January.