Guillermo Díaz, better known by his youtube name Willyrex, is a Spanish Youtube personality and author. He has two YouTube channels: Willyrex and TheWillyrex. As of November 2017, his youtube channel TheWillyrex has over 12 million subscribers and 4.35 billion views, making it the 3rd most subscribed channel in Spain and the 75th most subcribed channel in the world.