When star couple Taylor Swift and Calvin Harris celebrated their first anniversary, fans were thrilled seeing them spend the day together and exchanged gifts to mark a year in their lives as a couple. Harris gave Swift a heart gold locket aside from a cake and she was recently spotted wearing it for the first time.

The "Blank Space" star was seen at The Church Key in Los Angeles, wearing a plunging black outfit with the gold locket around her neck. Said locket is a gift from her 32-year-old boyfriend Harris with the date "3-6-2015" enraged on it, which could be the date when the two officially became a couple, ET Online reported.

"He bought the locket all on his own," a source said according to E! News, adding that there is something special inside it. "Calvin is not a flashy guy when it comes to gifts and he knows Taylor appreciates the small meaningful things, so he thought this would be the perfect gift."

A close-up picture of the trinket from the Scottish DJ was posted by Swift with the caption, "3.6.15 One year down!" after Harris shared a Snapchat of Swift happily smiling with a chocolate cake bearing a "1 year" frosting and two red hearts.

The nine-second video clip features the music producer who excitedly said, "One year, we got one-year cake!" while the "Bad Blood" singer was smiling and nodding.

Meanwhile, it was recently reported that Harris refused to work with Swift since he fears that this might ruin their relationship same as what happened to him and Rita Ora. From the start, the couple has separated business and personal life, manifesting how serious they are about their relationship.

Swift's one year relationship with Harris is the longest after she dated Jake Gyllenhaal, Taylor Lautner, John Mayer, Harry Styles and Joe Jonas.

 3.6.15 One year down! ❤️

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

Join the Discussion