By Maria Mercedes Lara
March 07, 2016 at 03:33 PM EST
Kevin Winter/BMA2015/Getty Images

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What do you get the girl that has everything? A sentimental locket, of course.

Calvin Harris and Taylor Swift celebrated their one-year anniversary on Sunday in the most adorable fashion – first, there was a “one-year cake,” as Harris put it in a Snapchat, and then there was a special locket for Swift.

“We got a one-year cake,” Harris said in his Snapchat shared on Sunday, showing him and the singer getting excited about their apparently homemade anniversary sweet.

“We got one year cake, it’s one year,” the DJ continued, adding a small, “Yay” at the end of his video.

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Later, Swift shared a close-up of a gold locket, presumably gifted to her by her musician beau.

“3.6.15,” she captioned the photo. “One year down!”

While the couple mark their one-year anniversary on Sunday, their romance didn’t become public knowledge until May of last year, meaning that they had managed to keep their romance under wraps for a little over two months.