Fanny Eaton (23 June 1835 – 4 March 1924) was a Jamaican-born artist's model and domestic worker. She is best known as a model for the Pre-Raphaelite Brotherhood and their circle in England between 1859 and 1867. Her public debut was in Simeon Solomon's painting The Mother of Moses, which was exhibited at the Royal Academy in 1860. She was also featured in works by Dante Gabriel Rossetti, John Everett Millais, Joanna Mary Boyce, Rebecca Solomon, and others.

Eaton was born Fanny Antwistle or Entwhistle on 23 June 1835 in Saint Andrew Parish, Jamaica, just ten months following the 1 August 1834 enactment of the abolition of slavery throughout the British empire. It is speculated that her mother, Matilda Foster, a woman of African descent, was born into slavery on the Elim Estate in St Elizabeth parish, property of the Foster or Forster family. No father was named on Eaton's birth records, suggesting that she may have been illegitimate. The death of a British soldier named James Entwistle, aged twenty, in nearby St Catherine's parish (burial in Spanish Town on 4 July 1835), eleven days after Fanny's birth, has been seen as suggestive that this soldier may have been Fanny's father.

Eaton and her mother made their way to England some time in the 1840s. By 1851 she is recorded as living in London, at 9 Steven's Place, St Pancras, with her mother, and working as a domestic servant. In 1857 she married James Eaton, a horse-cab proprietor and driver, who was born on 17 February 1838 in Shoreditch. Together, they had 10 children, born in the years 1858-1879.

It was during this period of Fanny Eaton's life as mother and new wife that she began modelling, both for the Royal Academy of Arts School of Painting (where she was paid 5 shillings for each modelling session, with her maximum recorded schedule reaching three sessions in a single day), for the Pre-Raphaelites, and for other less well-known artists of the period.

Her distinctive features were used by artists to portray a variety of ethnicities and characters. The earliest studies done of her are a coloured sketch by Walter Fryer Stocks and a series of portrait sketches by Simeon Solomon in 1859. These latter sketches were evidently used as preparation for Solomon's Mother of Moses, now in the collection of the Delaware Art Museum. Two specific sketches from this series depicted Eaton as the Biblical figures Jochabed and Miriam. The finished painting was shown at the Royal Academy in 1860 Exhibition.

Simeon Solomon was from a noted family of painters; his sister, Rebecca Solomon, also painted Eaton during this period. Rebecca, who studied with John Everett Millais, may have provided Eaton's link to artists in the Pre-Raphaelite Brotherhood, but this is speculation. In 1865, Dante Gabriel Rossetti employed Eaton to pose for the figure of one of the bridesmaids in his painting The Beloved. Rossetti further produced at least one other portrait sketch (c. 1865, Iris & B. Gerald Cantor Center for Visual Arts at Stanford University).

Eaton also modelled for other artists in the Solomons circle of friends, including William Blake Richmond and Albert Joseph Moore. This includes Richmond's painting The Slave (1886), found in Tate's collection, and recently identified as another artwork in which Eaton worked as the model.

Eaton appears in a black chalk drawing by Rossetti, now in the Cantor Arts Centre at Stanford University in California.