David Nicholls is a British author and screenwriter, best known for his novels that often explore themes of love and relationships. He gained widespread recognition for his book One Day, which follows the lives of two characters over several years, capturing their evolving relationship. The novel was adapted into a film in 2011, further increasing his popularity. In addition to his writing, Nicholls has worked in television and film, contributing to various projects. He has also written screenplays for adaptations of other literary works, showcasing his versatility as a storyteller. His engaging style and relatable characters have made him a favorite among readers.