Melusine Mayance is the young actress in Sarah's Key. She is so adorable and really an amazing actress! This movie is a must see! I've watched it twice and i could watch it again. Holocaust movies are always something that interests me and this was a story I had never heard before. 10 year-old Sarah Starzynski is arrested with most of her family in the Vél d’Hiv roundup of Parisian Jews in 1942. Before being forced out of their apartment Sarah hides her little brother in the closet and locks it away with the key. The story flashes forward to present day, as an American journalist in Paris, tries to piece together the life of the girl and her brother. It's such a beautifully done film and really eye opening too.