Lavinia Powlett, Duchess of Bolton, known by her stagename as Lavinia Fenton, was an English actress who was the mistress and later the wife of the 3rd Duke of Bolton.

Charles Powlett, 3rd Duke of Bolton, styled Earl of Wiltshire from 1685 until 1699, and Marquess of Winchester from 1699 until 1722, was a British landowner and Whig politician who sat in the English House of Commons from 1705 to 1708 and in the British House of Commons between 1708 and 1717, when he was raised to the peerage as Lord Powlett and sat in the House of Lords.