Carol Nielsson was born in the UK, but spent her formative years as a native of Reykjavik, Iceland, where she sang publicly for the first time on radio at the age of 8. At the age of 20 she played her first leading role in Hair followed by Jesus Christ Superstar.

In 1980 Carol moved to Sweden with her six piece band, and spent the next 3 years touring Scandinavia. She also won a Nationwide singing contest, and had he debut record at no.10 in the Swedish charts.

She subsequently returned to the UK where she worked as backing vocalist for the renowned comedian Freddie Starr.

She successfully auditioned for the original cast of Andrew Lloyd Webber'smusical "Evita" at the Prince Edward Theatre, London. She went on to act as standby for Marti Webb in the starring role in the original version of "Song & Dance" at the Palace Theatre, London leaving "Song & Dance" to appear as Mary Magdalene in a third Lloyd Webber musical "Jesus Christ Superstar" in its first regional repertory productions at the Theatre Royal, York and the Theatre Royal, Norwich.

Carol then returned to the Palace Theatre, London to perform the starring role of "Song & Dance" for 3 months, after which she was offered the lead (Grizabella singing the hit song Memory) in "Cats" in London in 1984 and 1985.  

The National Theatre in Reykjavik, Iceland offered her to appear as Roxy Hart in the hit musical "Chicago".

Carol moved to Los Angeles, furthering her career as an actor while studying drama at  Estelle Harmans Actor Workshop Carol played Jennie in Neil Simon's Chapter Two, and Dianne in California Suite in Los Angeles. 

She also performed the leading role in Jesus Christ Superstar in Baltimore MD and cabaret in Washington DC.

Carol performances on Television and Radio include: Live recordings with the BBC-2 Symphony Orchestra.  Seven shows, BBC-2 Songs from the Shows.  Named Best Artist on Radio by Terry Wogan (BBC radio).  Guest starred in various Variety Specials on TV.   Song and Dance (Andrew L. Webber), Six for Gold and Rick Friends Atlantis (The Musicals-original recordings).