Frederica of Mecklenburg-Strelitz (full name: Frederica Louise Caroline Sophie Charlotte Alexandrine) (3 March 1778 – 29 June 1841), Duchess of Cumberland and later Queen of Hanover (now part of Germany), was the consort of Ernest Augustus I of Hanover, the fifth son and eighth child of George III and Queen Charlotte.
She was born in the Altes Palais of Hanover as the fifth daughter of Charles II, Duke of Mecklenburg-Strelitz, and his first wife, Frederica, daughter of George William, Prince of Hesse-Darmstadt. From birth until her first marriage her title was Her Serene Highness Duchess Frederica of Mecklenburg, Princess of Mecklenburg-Strelitz
Her father assumed the title of Grand Duke of Mecklenburg on 18 June 1815. Duchess Frederica was the niece of her future mother-in-law, Queen Charlotte (formerly Duchess Charlotte of Mecklenburg-Strelitz), since her last husband was her first cousin.
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