A total of 3.4 million UK households have connected their Sky box to their broadband line, it has been revealed.
Sky said Q3 2013 was a "record quarter" for TV connections, with 642,000 customers linking their broadband line to their Sky+HD box in order to access on-demand services.
Just 12 months ago, the number of customers with a connected Sky box was only 1.3 million, showing the rapid rate of progress made by the TV and broadband provider.
"Our plan to accelerate growth in new connected TV services has had an immediate impact," it stated.
Sky now claims to be "the UK’s fastest-growing connected TV service".
The firm explained how it expanded the range of TV and film content available to access on-demand between July and September this year.
This was achieved through the launch of new Catch Up TV channels, such as Universal and the Disney Channel, and the addition of new TV box sets.
"Overall, the number of average weekly Sky On Demand downloads increased fourfold to over 6.5 million, while the number of movie rentals through Sky Store more than doubled to 2.1 million," Sky stated.
The firm said it continues to make "good progress" in its work to improve operating efficiency and service delivery for UK customers.
"Our most reliable Sky+HD set-top box is now in nearly eight million homes, up almost 20 per cent year-on-year," it added.
"This increased penetration helped reduce the number of service visits by nine per cent."