The UK's leading broadband providers will be required to block four more websites following a decision by the UK high court.
A group of US film studios successfully argued that Megashare, Viooz, Watch32 and Zmovie were facilitating copyright infringement by allowing internet users to access movies for free.
As such, broadband providers such as BT, Sky and Virgin Media are set to receive instructions to prevent access to the websites under section 97A of the Copyright, Designs and Patents Act.
Speaking to TorrentFreak, a spokesperson for the Federation Against Copyright Theft (FACT) explained that it - along with the Motion Picture Association (MPA) - had written to the four websites asking them to stop infringing creative content.
"Collectively, these sites provide access to an enormous collection of films with no permission from the copyright owners," the representative stated.
"FACT, supported by the MPA, therefore took this court action."
Of the four websites subject to the high court order, Viooz is the largest. According to the news provider, it is among the 500 most-visited websites in the UK.