Gaynor Hopkins was born on June 8, 1951 in Skewen, Neath, in South Wales, the daughter of Glyndwr Hopkins, a coal miner, and his wife, Elsie (nee Lewis). She grew up in a council house with three sisters and two brothers whose musical tastes included Frank Sinatra, Elvis Presley and the Beatles although her favourites were Janis Joplin and Tina Turner, both powerful female singers.
It was a deeply religious background, attending chapel three times a day on Sundays. It was there that she gave her first public performance as child with a rendition of the hymn All Things Bright And Beautiful.
Having left school at 16 with no qualifications, in 1969 she was entered into a local talent contest by an aunt, finishing second. Although the prize money was just 1, she was encouraged by her success to pursue a career in music, initially finding work as a backing singer with Bobby Wayne and the Dixies.
In 1975 she was spotted performing in the Townsman Club in Swansea by talent scout Roger Bell who invited her to London to record a demo tape.
Months later she was offered her first recording contract by RCA who advised her to change her name. She came up with Bonnie Tyler from a list of first names and surnames picked from a newspaper.
Her debut single My! My! Honeycomb was a flop but the follow-up Lost In France became her first hit, reaching number nine in the UK singles chart, leading to her debut appearance on Top Of The Pops.