Charlotta "Lotta" Fredrika Sparre (1719 – 20 December 1795, Stockholm), commonly named Lotta Sparre, was a Swedish noble and courtier.
Lotta Sparre was the daughter of Baron Fredrik Henrik Sparre and Virginia Christina Lilliehöök af Fårdala. Her beauty made her famous at the royal French court at Versailles, where she was known as “la charmante rose” when she stayed in France 1739–1742 with her relative Ulla Sparre, the wife of Carl Gustaf Tessin. She also followed Tessin to Berlin, where Prince Augustus William of Prussia is reported to have fallen in love with her.
On 18 February 1748 she married royal Crown Forester Count Carl Reinhold von Fersen and became the mother of Ulla von Höpken and Augusta von Fersen. During her stay in Paris, she studied dance under Marie Sallé, which she in turn taught her daughters, who were to become famous for the grace and talent within dance in the amateur theater of Gustav III.
Sparre was, with the Count and Countess Tessin, a part of the entourage which accompanied Louisa Ulrika of Prussia from Prussia to Sweden upon her marriage to the Swedish Crown Prince Adolph Fredrik in 1744, and she served as a maid of honor to Louisa Ulrika in 1744-48. During her time as maid of honor, she and her future spouse were described as the first stars of the amateur theater of the royal court, which consisted of amateur actors from the court nobility and who performed French plays at court from the autumn of 1744 until at last the arrival of the Du Londel Troupe in 1753.
She served as överhovmästarinna to the next Swedish Crown Princess and Queen, Sophia Magdalena of Denmark, consort of Gustav III of Sweden, from 1767 until 1795: first as sub-mistress under Anna Maria Hjärne and Ulrika Strömfelt and formally as head mistress of the robes from 1780; Hjärne and Strömfelt only officiated during larger ceremonies, while Sparre was in service during the every day life. During the summers of 1767 and 1768, she tried to reconcile the Crown Prince couple to consummate their marriage at Ekolsund Castle, which first seemed successful, but eventually failed. During these attempts, she blamed the Crown Prince for his infatuation in Charlotte Du Rietz.