Taylor Swift, Calvin Harris celebrate 1-year anniversary with cake, locket

After a year together, Taylor Swift and Calvin Harris have marked their major relationship milestone with jewelry and a dessert, natch.

The "Bad Blood" singer and the deejay, real name Adam Wiles, commemorated their young love on social media, with her posting a picture of her new golden locket on Instagram on Sunday evening and him SnapChatting video of a "1 year" cake.

See the most-read stories in Entertainment this hour >>

"3.6.15 One year down!" wrote Swift, 25, posting the snapshot of the vintage-looking trinket engraved with the date.

3.6.15 One year down! ¿¿

A photo posted by Taylor Swift (@taylorswift) on Mar 6, 2016 at 3:03pm PST

The Scottish EDM star, 32, wanted to get his girlfriend a meaningful gift to mark the occasion and reportedly stashed "something special" (and also top secret) inside the locket, E! News said.

Harris' Sunday SnapChat video showcased a homemade cake frosted with "1 year" on it and a voiceover in which he repeated the phrase. He then cuts to an excited-looking Swift nodding in approval.

The musicians reportedly met in February 2015 at a Brit Awards after-party and started dating last March. Still, they didn't really go public until a few months later, after a series of Calvin-and-Taylor sightings sent the "new couple" rumor mill into overdrive.

See more of Entertainment's top stories on Facebook >>

Since then, they've shared their PDA on social media and at awards shows and kept fans and followers speculating about potential upcoming tracks inspired by each other.

OK, maybe that last part was just us.

Follow me on Twitter @NardineSaad.