Letters of Two Brides (Mémoires de deux jeunes mariées) is an epistolary novel by the French writer Honoré de Balzac. It was serialized in the French newspaper La Presse in 1841 and published by Furne in 1842 as the first work in the second volume (Scènes de la vie privée, tome II or Scenes from Private Life, Volume 2) of Balzac's La Comédie humaine. It was dedicated to the French novelist George Sand. The first English translation of the novel appeared in 1902, with a preface by Henry James.
The story concerns two young French women, Louise de Chaulieu (1805-1835) and Renée de Maucombe (born 1807), who become close friends during their novitiate at the Carmelite convent of Blois. When they leave the convent, however, their lives follow two very different paths. Louise chooses a life of romance, whereas Renée takes a much more pragmatic approach; but their friendship is preserved through their correspondence, which continues for a dozen years from 1823 through 1835.