Celador is a small British production company that operates on a project-by-project basis, contracting freelance staff for each production. It was originally owned by Complete Communication but was sold in 2006. In 2004, Celador sued Disney for unpaid profits from screenings of Who Wants to be a Millionaire? in the US. Notable films produced include Dirty Pretty Things, Separate Lies, The Descent, and Slumdog Millionaire, often through co-productions with other small companies. Though much smaller than major Hollywood studios like 20th Century Fox, Celador has found success competing with larger films.