Mariana Victoria of Spain (31 March 1718 – 15 January 1781) sometimes Maria Anna Victoria was an "Infanta of Spain" by birth and was later the Queen of Portugal as wife of King Joseph I. The eldest daughter of Philip V of Spain and Elisabeth Farnese. Under the influence of the Duke of Bourbon she was engaged to the young Louis XV of France at the age of seven. Rejected due to her age, the marriage never took place and she was sent back to Spain. In 1729 she was married to the son of John V of Portugal. Her husband became the King on 31 July 1750. The mother of Maria I of Portugal she also acted as regent of Portugal during the last months of her husbands life and acted as advisor to her daughter in her reign.