This spring, winter is coming to Sling TV.

Dish's Sling TV service announced Wednesday that customers can elect to add some HBO content to their monthly package in time for the "Game of Thrones" and "Silicon Valley" premieres on April 12th. (It hasn't given an exact launch date yet.)

Getting HBO shows -- live, plus some video-on-demand -- will cost an additional $15, on top of SlingTV's $20 per month fee for channels such as ESPN, AMC and TBS. There are also additional $5 per month packages that give customers extra focused programming such as "Sports Extra," "Hollywood Extra" or "World News Extra."

It's important to note that this is not the same thing as HBO Now, which will be available exclusively though Apple TV for three months. (That also costs $15 per month.) While you won't need an HBO subscription to watch the channel on Sling TV either, this definitely isn't an offer to get HBO all by itself.

In other words, this is still a bundle. But even at $35-$40 per month, it is undeniably cheaper than cable.