ThisisBigBrother.com, founded by Mark Rayson in 2001, has established itself as the premier online community for Big Brother enthusiasts and reality TV fans in the UK. Known fondly as TiBB among its loyal members, the site features the country’s most active dedicated Big Brother forum, allowing fans to engage in lively discussions across a myriad of topics including Big Brother, X Factor, and I'm a Celebrity. As of 2023, TiBB boasts over 10 million posts and 360,000 threads, reflecting its robust growth and popularity.

In addition to its vibrant forum, ThisisBigBrother.com offers a comprehensive Picture Gallery, showcasing thousands of images from various Big Brother seasons and other Reality TV shows. The platform is strengthened by a dedicated team of administrators and moderators who ensure a welcoming and well-organized environment for members. By continually adapting and expanding its offerings, ThisisBigBrother.com continues to thrive as a cornerstone of reality TV fandom.