Celador originally produced television shows but gained success from Who Wants To Be A Millionaire. This allowed Celador to become self-sufficient and expand into film production and international markets. One of their most profitable films was Slumdog Millionaire, which they funded themselves and shot with a UK and Indian crew. While The Descent was also profitable for Celador, other films from that time period like Nanny McPhee and X-Men films had higher budgets but also higher profits.