Augustus Henry FitzRoy, 3rd Duke of Grafton,, styled Earl of Euston between 1747 and 1757, was a British Whig statesman of the Georgian era. He is one of a handful of dukes who have served as prime minister.

The Corsican Crisis was an event in British politics during 1768–69. It was precipitated by the invasion of the island of Corsica by France. The British government under the Duke of Grafton failed to intervene, for which it was widely criticised and was one of many factors that contributed to its downfall in early 1770.