Louisa Ruth Herbert (1831 – 1921) was a well-known Victorian-era English stage actress and model for the artist Dante Gabriel Rossetti.

One of her well-known roles was the lead in an 1863 stage production of the sensation novel Lady Audley's Secret at St. James's Theatre.

Author Mary Elizabeth Braddon said Herbert gave her favorite performance as Lady Audley.

As he was waiting for her to arrive, he wrote his friend William Bell Scott of his enthusiasm for her: "I am in the stunning position this morning of expecting the actual visit at 1/2 past 11 of a model whom I have been longing to paint for years – Miss Herbert of the Olympic Theatre – who has the most varied and highest expression I ever saw in a woman's face, besides abundant beauty, golden hair, etc.

Rossetti and Herbert did not stay in regular contact past 1860, though he based a future work on the drawing and painting he had done of her previously.