Launching on position 429 on Virgin Media's electronic programming guide, Film4 HD will offer a daily lineup of British, American and foreign films in high definition, alongside interviews and exclusive programming.
The channel will also carry movies produced by Film4, such as Mike Leigh's Happy Go Lucky, Ken Loach's Looking For Eric and the Oscar-winning Slumdog Millionaire.
While announcing Film4 HD in March, Virgin Media's director of digital entertainment Cindy Rose said: "Channel 4 has a great track record in delivering innovative and compelling content and we're delighted to bring some of their very best films and most popular programmes to our customers in stunning HD.
"As more and more households become HD-ready, we're lining up content that makes the most of high definition and are making HD available to all our of customers for no extra fee."
Channel 4 head of VOD and channel development Sarah Rose added: "We're really excited to be launching Film4 HD and showcasing some fantastic British films to millions of viewers in high definition.
"There's a growing appetite for HD and our lineup of Channel 4 HD, E4 HD and now Film4 HD provides a great choice of HD content for viewers."
For the Film4 HD launch, Virgin Media has rearranged the Film4 bouquet of channels on its EPG, which runs as follows:
429 Film4 HD
430 Film4 +1
In May, Channel 4 confirmed plans to increase the development and financing budget at Film4 by 20% to help the division back more British filmmaking talent.