Charles Watson-Wentworth, 2nd Marquess of Rockingham, was a British Whig statesman and magnate, most notable for his two terms as prime minister of Great Britain. He became the patron of many Whigs, known as the Rockingham Whigs, and served as a leading Whig grandee. He served in only two high offices during his lifetime but was nonetheless very influential during his one and a half years of service.