The Woman in Black was very successfully marketed through extensive social media campaigns, billboards, radio advertisements, and appearances by Daniel Radcliffe, the star formerly known for Harry Potter. This wide-reaching marketing spent about half of the film's $17 million budget and generated significant buzz among the target audiences of males and females aged 25 and younger. The mass marketing was highly effective, as the film became one of the most successful horror movie openings ever and the highest grossing British horror film in 20 years.