This research paper describes the development and capabilities of "Movie Gen," a new suite of generative AI models that produce high-quality, realistic videos and audio. The paper highlights key advancements in text-to-video and video-to-audio synthesis, video editing, and video personalization. The authors detail their models' architecture, training procedures, and evaluation metrics, demonstrating superior performance compared to existing commercial and open-source solutions. This research aims to advance the field of media generation and enable new creative possibilities.