The almond milk is available now - joining soya and coconut drinks as an alternative to dairy.
A spokesperson for Costa Coffee told Plant Based News that the launch comes as 'consumer demand for vegan options and 'free-from' products reaches an all-time high'.
"Research reveals over a quarter of Brits now consider themselves to be flexitarian, and one in three regularly choose plant-based alternatives when they're dining out, whilst two in three customers in the UK think coffee shops should have more than one plant-based drink choice on the menu," they added.
"We know our customers want more choice when it comes to coffee customization and have witnessed a growing demand for 'free-from' and vegan options," added Russell Braterman, Innovations Director at Costa Coffee.
"Given the popularity of the coconut alternative drink, which we introduced last year, our almond options is the next logical step.
"Our seven-strong-range [of milk] means we can now cater to our customers' unique preferences, without compromising on the great taste they love."
Coffee Costa also offers a number of vegan food items - which include the Chipotle Bean & Butternut Squash Wrap added in in the first half of 2017.
They were followed later in the year by the Thai Red Curry Meal Pot, and a Vegan Sticky Toffee and Pecan Pudding Cookie.