Sissy Spacek doesn’t just play Loretta Lynn in Coal Miner’s Daughter; she completely inhabits her, delivering a transformative, Oscar-winning performance that serves as the film's beating heart. While the narrative follows the "rags-to-riches" blueprint common to music biopics, the execution is exceptionally soulful, grounded by a gritty, authentic atmosphere that captures the hardships of Appalachian life. It manages to be both a tender character study and a rousing success story, making for a deeply satisfying watch that transcends the tropes of the genre through sheer emotional honesty and stellar chemistry between Spacek and Tommy Lee Jones.