Fiennes was born in
Ealing in London and was the daughter of
Alberic Fiennes, (1865–1919), who worked at the
Bank of England and his wife Gertrude, the daughter of a Royal Navy officer. Celia Fiennes was a direct descendant of the 17th-century travel writer
Celia Fiennes. Also in 1926, she produced twelve wood engravings for the
Cresset Press edition of
Matthew Stevenson's 1661 work
The Twelve Moneths. In December 1932 Fiennes married
Noel Rooke who had been one of her teachers at the Central School and was considered a leading light in the revival of wood engraving as a technique in Britain. In later life Fiennes turned from printmaking to concentrate on painting and in due course retired to a village near
Banbury called
Culworth where she died in 1998. ==Works illustrated==