The company said that those features and others, such as being able to have Alexa read you your Kindle e-books through your Fire TV, would launch in the "coming weeks." (Amazon chief executive Jeffrey Bezos is the owner of The Washington Post.)
Amazon is also adding YouTube's catalog of 4K content for streaming on the Fire TV.
The online retail giant is clearly taking video more seriously, particularly with its recent announcement that it will take on Google's YouTube by encouraging Amazon users to submit their own videos to the new Amazon Direct video platform.
But the company also has its eye on a much wider picture. The Alexa addition to the Fire TV pulls a few of the firm's threads together: its push into artificial intelligence through Alexa, its video expansion and its attempt to take a foothold in the smart home market. That sharpens competition with two opponents, Google and Apple, which are also actively pursuing those areas.
None of them have woven it all together quite yet. A truly killer piece of hardware might have to successfully bring all three segments -- entertainment, smart appliances and voice control -- together and make them compatible with a wide variety of products.
Amazon didn't include any mention Tuesday of bringing Alexa's smart-home control capabilities to Fire TV. Apple has meanwhile expanded its Apple TV set-top box to work with Siri and its own smart appliance operating system, HomeKit, but there aren't that many HomeKit compatible devices. Google is expected to go a slightly different route, by skipping the television (for now) and introducing an Amazon Echo-like speaker and voice-controlled home hub codenamed "Chirp."
Amazon's latest announcement takes a step forward for consumers looking to buy a "Star Trek"-esque, voice-control system for their very own homes. But for most, it's probably still not quite time to open those wallets.