| Sophia Dorothea of Celle | |
|---|---|
| Electoral Princess of Hanover Duchess of Ahlden | |
 Portrait from the 1690s. Currently displayed at the Residence Museum (Residenzmuseum) in Celle Castle. | |
| Born | 15 September 1666 Celle Castle, Celle, Principality of Lüneburg |
| Died | 13 November 1726 (aged 60) Ahlden, Germany |
| Burial | May 1727 Stadtkirche, Celle |
| Spouse | |
| Issue | |
| House | Hanover |
| Father | George William, Duke of Brunswick-Lüneburg |
| Mother | Éléonore Desmier d'Olbreuse |
Sophia Dorothea of Brunswick-Lüneburg-Celle (15 September 1666 – 13 November 1726) was the repudiated wife of future King George I of Great Britain. The union with George, her first cousin, was a marriage of state, arranged by her father George William, her father-in-law the Elector of Hanover, and her mother-in-law, Electress Sophia of Hanover, first cousin of King Charles II of England. Sophia Dorothea is best remembered for her alleged affair with Count Philip Christoph von Königsmarck that led to her being imprisoned in the Castle of Ahlden for the last thirty years of her life.