Mariana Victoria of Spain 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, 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 Infante José, son of John V of Portugal and successor to his father as Joseph I of Portugal. She also acted as regent of Portugal during the last months of her husband's life and as advisor to her daughter, Maria I of Portugal, in her reign.