Love, Rosie is a romantic comedy-drama film based on the novel 'Where Rainbows End' by Cecelia Ahern. Lily Collins plays the lead role of Rosie Dunne, a young woman who has been best friends with Alex (played by Sam Claflin) since childhood. The film follows their journey as they navigate through life, love, and missed opportunities. Love, Rosie is a heartwarming and relatable story about friendship, love, and the complexities of timing.