Existing Sky TV customers can upgrade to Sky Cinema for a reduced price until midnight on September 22nd.
Subscription will cost £12 extra a month for a year, before going up to the standard rate of £18 a month.
This will offer customers the chance to enjoy more than 1,000 movies on demand without committing to a contract.
Sky Cinema also promises "a new premiere every day", ranging from family movies to the biggest blockbusters.
Major films can be viewed eight months after they have been released in cinemas and over a year before they can be watched on other subscription services.
New and improved HD comes as standard at no extra cost, while the audio will be "closer to cinema sound for a brilliant cinematic experience at home".
Sky Cinema was launched in July, helping the company enjoy what it has described as an "outstanding year of product innovation".