Constance Fecher was born on 6 August 1911 in Enfield, Middlesex, London, England, UK. She was educated at the Convent of Woodford Green, Essex since 1921 to 1928, when she joined to study at King's College London, where she obtained a Honours degree in English in 1931. In 1931, she also graduated at London College of Music.
In 5 November 1939, she married William Heaven, who died in 1958. She was actress since 1939 to 1966.
Published since 1963, she started writing historical novels with young protagonists under her maiden name Constance Fecher. Since 1972, she signed her novels more romantic, under her married name, Constance Heaven. She also used de pseudonym of Christina Merlin.
In 1973, her novel "The House of Kuragin" was the Winner of the Romantic Novel of the Year Award, and years later she was elected the eleventh Chairman (1981-1983) of the Romantic Novelists' Association. Connie passed away in in 1995, and continued writing until her death.