英文片名乍看以為是其經典之作「Love Letter」。 中文名的「你好」亦似曾相識:《情書》中的經典對白「你好 嗎?我很好」。故事同樣與書信有關，周迅飾演的妹妹代替剛去世的姐姐參加同學會聚會，與中學時代仰慕的男生重逢。兩人以書信方式聯繫，姐姐的生命彷彿在書信中回閃，幾段橫跨三代人的故事正悄然發生。電影一系列海報十分破格，導演、監製、女主角齊齊亮相，而且構圖與岩井俊二經典《四月物語》、《青春電幻物語》、《花與愛麗絲》呼應。

Japanese director Iwai Shunji makes his Chinese- language debut with this transcendent love story, produced by Hong Kong director Peter Chan. Seemingly a nostalgic callback to Iwai’s own 1995 classic Love Letter, the elegant Last Letter stars Zhou Xun, a woman who reunites with a man from her past when she attends a school reunion on behalf of her late sister. The reunion eventually leads to an exchange of letters that gives her new insight into a side of her sister’s life that she’d never known.