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(CNN Business) —  

Apple is opening up its ecosystem to one of its biggest rivals by giving owners of Samsung TVs direct access to iTunes content.

Starting in the spring, Samsung will include an iTunes app in its Smart TVs, the South Korean company announced Sunday at CES, the annual consumer technology conference in Las Vegas. Samsung is the largest TV maker in the world.

The new app will allow people to watch movies and TV shows they’ve already bought on iTunes, or buy new ones. The odd marriage will even let people use Samsung’s Bixby voice assistant to play iTunes content. Samsung Smart TV’s will also run Apple’s AirPlay 2, which lets users play videos, music and photos from iPhones and other Apple devices on speakers and TVs.

Apple (AAPL) is not known for sharing. The company has long prided itself on the tightly controlled universe of apps available on its devices. That approach has helped persuade customers to stick with Apple products, but it also limits the reach of subscription services like Apple Music and iCloud at a time when the company needs that extra revenue more than ever.

Apple showed signs of loosening its grip in November when it announced that Amazon’s (AMZN) Echo devices would support Apple Music. The two companies also struck a deal that allows Amazon to sell Apple devices directly, in exchange for cracking down on unauthorized third-party sellers on the site. A year earlier, Apple finally allowed the Prime Video app on Apple TV.

Still, a deal with Samsung is even more interesting, as the giant smartphone makers have a complicated history.

They spent years locked in a costly legal battle over patents after Apple claimed Samsung had copied parts of the iPhone design. At one point, Apple wanted Samsung to pay $2 billion, and the case ended up at the US Supreme Court. The companies finally settled last summer for an undisclosed amount.

Samsung and Apple do know how to work together in some areas, though. Samsung used to make chips for Apple devices, and it now makes displays for iPhones.

“The company has historically had rocky relations with other hardware makers, preferring to imagine a world in which everyone buys an Apple device, then powers it with Apple services,” said James McQuivey, an analyst at Forrester Research. “This was the model for the original iPod, as most people forget. You couldn’t use iTunes on a PC originally. Eventually Apple got wise.”

Apple’s services push

The new deal to put iTunes on Samsung TVs shows Apple is open to even more cooperation.

“We look forward to bringing the iTunes and AirPlay 2 experience to even more customers around the world through Samsung Smart TVs,” said Eddy Cue, senior vice president of internet software and services at Apple.

As Apple’s sales of iPhones and other devices has slowed, the company has increasingly turned to its services business, which includes iTunes, for growth. The division — which also houses the App Store and Apple Pay, as well as Apple Music and iCloud subscriptions — brought in $10 billion in revenue last quarter.

Putting iTunes on Samsung TVs also sets the stage for an Apple streaming service that could go up against Netflix (NFLX). Apple has been snatching up original content and is expected to launch its service later this year.