《四十年》是由侯季然执导，陶晓清,杨弦,胡德夫,吴楚楚主演的剧情片。该电影于2016年在中国台湾上映。一九七零年代，台湾掀起年轻人自己写歌自己唱的“民歌”热潮，当年的民歌手与歌，不只反映了当时社会的精神面貌，也描绘了某一个世代青年的面貌。四十年后，歌曲仍然传唱，唱歌和听歌的人经历了四十年的光阴，都到了人生的下半场。一场四十年后重聚的演唱会，犹如降灵夜，召唤青春的记忆，与当下的生命对照、对话。不论是宝变为石的感概，还是历久弥新的激情，都在一首首大合唱的民歌裡找到归向。本片以民歌四十周年演唱会为轴心，往外辐射民歌时代的代表人物们：杨弦、胡德夫、陶晓清、吴楚楚、杨祖珺、李建复、侯德健、李宗盛、邰肇玫……此时此刻的生活实貌，以及对创作、对国族认同、对人生起落的所思所想。这是歌的故事，也是时间的故事。
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