Caroline, Lady Duff (née Lady Caroline Paget) (15 June 1913 – 22 May 1973) was the daughter of Charles Paget, 6th Marquess of Anglesey and Lady Victoria Manners, eldest daughter of the 8th Duke of Rutland. She was born on 15 June 1913, and became the second wife of Sir Michael Duff, 3rd Baronet, on 14 July 1949.
During the thirties, she was a notable British socialite, and a minor actress. She was beloved of the artist Rex Whistler, who painted numerous portraits of her, including a startling nude, which is on display at Plas Newydd, (the ancestral home of the Marquess of Anglesey). There are several references to her in the published journals of Edith Olivier and The National Screen and Sound Archive of Wales has footage of short films featuring Caroline and her sister Elizabeth, as well as other material.
On 22 May 1973, Lady Caroline Duff died at the age of 59. She had one child, an adopted son, Charles Duff (b. 1950).