The Xbox One version of Sky's NOW TV app is not expected to launch until the summer, representing a delay of more than half a year.
Microsoft recently listed NOW TV as one of thirteen apps available on Xbox One on launch day.
But in a statement provided to Videogamer, Sky acknowledged that this would not be the case.
Now TV is a drop-in-drop-out content streaming service, in which users can pay one-time fees to access channels such as Sky Movies, Sky Sports and more. Although it had been rumoured that Sky and Microsoft's partnership would extend further for Xbox One, currently this is the only product Sky is discussing for the console.
Meanwhile, the Sky Go app, which lets users access their Sky subscription TV packages via Xbox, has not even been confirmed for Xbox One.
"We enjoy a long track-record of innovating with Microsoft and look forward to the launch of NOW TV on Xbox One by summer next year," read a statement.
"As a dedicated over-the-top service, we have prioritised the availability of NOW TV, to extend the reach of the service to the main TV. Looking ahead, we will also consider any future opportunities for Sky Go."
Xbox One's first wave of third-party apps in the UK now consists of 4oD, blinkbox, Crackle, Demand 5, Eurosport, LoveFilm, Machinima, MUZU TV, Netflix, TED, Twitch and Wuaki.tv.
They will be joined by Microsoft's Xbox Fitness, Xbox Video, Xbox Music, Internet Explorer, Skype, SkyDrive and Upload services on the Xbox One release date of November 22, 2013. Users will require an Xbox Live Gold membership to access the apps.
The BBC has confirmed that it's working on a version of its iPlayer app for Xbox One.