A comedy writer is suing Walt Disney claiming he was the brainchild behind hit TV show Hannah Montana. Buddy Sheffield filed the lawsuit in Los Angeles Superior Court on Thursday (23Aug07) alleging breach of contract, breach of confidence, unfair competition and unjust enrichment. Sheffield - who has written for The Smothers Brothers Show and The Dolly Parton Show - claims he pitched an idea for a television series called Rock and Roland to the Disney Channel in 2001. According to the lawsuit, the story was about a junior high school student who lived a secret double life as a rock star. Sheffield claims Disney plagiarised the idea for their show Hannah Montana and is demanding a share of the revenue. Disney bosses were unavailable for comment.