Frederica of Mecklenburg-Strelitz (Friederike Louise Caroline Sophie Charlotte Alexandrine) (3 March 1778 – 29 June 1841) was a German princess who became, by marriage, princess of Prussia, princess of Solms-Braunfels, Duchess of Cumberland in Britain and Queen of Hanover (in Germany) as the consort of Ernest Augustus, King of Hanover (the fifth son and eighth child of King George III).