Paid subscriptions to U.K.-based publishers and creators have officially surpassed half a million on Substack , in exclusive new data released to The Hollywood Reporter . The milestone comes as Substack evolves beyond its founding newsletter offering into a one-stop platform for writing, podcasting, video and community building. The U.K. is the site’s second-largest market after the U.S., and among the high-profile Brits using Substack — where creators can publish content such as newsletters or blogs directly to subscribers — are Charli XCX , Jamie Oliver and, as of December 2025, Prime Minister Keir Starmer. Globally, readers are now paying for more than five million subscriptions to publishers on Substack across entertainment, current affairs, film, finance, fashion, food and culture. Over 50 people are making more than $1 million a year on Substack, and last summer, the company reached unicorn status with a $1.1 billion valuation following its Series C funding round. The bestselling U.K.…