Catherine Ann Stevens was born in Borough Green, Kent, England. She was educated at home, spending most of her childhood in Kent.

She married an army officer, Major John Crowe (1783–1860) and had a son, John William (born 1823), but the marriage was an unhappy one, and when she met Sydney Smith and his family at Clifton, Bristol in 1828, she asked them for their help. Little is known about the next few years, but by 1838 she was separated from her husband, living in Edinburgh, and had made the acquaintance of several writers, including the impecunious Thomas de Quincey of Edinburgh and Harriet Martineau and William Makepeace Thackeray of London. Smith was also an encouragement to her in her writing.

Stevens's success waned somewhat in the later 1850s and she sold her copyrights in 1861. After 1852, she lived mainly in London and abroad, but she moved to Folkestone in 1871, where she died the following year.