Relationship goals! Taylor Swift and Calvin Harris celebrated their one-year anniversary on Sunday with the cutest gift ever!

The music industry's hottest couple commemorated the milestone with a delicious-looking chocolate cake, which appears to be handmade, with the words "1 YEAR" written in white frosting along with two red hearts.

"We got a one-year cake," Harris said in the video he shared on his Snapchat account, which also showed Swift looking happy as ever as they showed off the homemade anniversary treat with their fans. "We got one year cake, it's one year," the music producer continued before adding a faint "yay" toward the end of the video.

Don't say "awww" just yet. Harris declared his love for Swift by gifting her one of the sweetest gifts she could ask for.

The "Bad Blood" singer took to Instagram to share a picture of a heart-shaped gold locket engraved with the date "3-6-2015," given to her by her beau to commemorate the day they started dating each other. "One year down," she captioned the post.

"He bought the locket all on his own. 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," said a source.

 3.6.15 One year down! ❤️

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


The source also revealed that the necklace had "something special" inside but did not specify the contents.

"Taylor is a true hopeless romantic kind of lady and she thought Calvin really outdid himself with this gift," the source continued. "He had surprises for Taylor all throughout the day."

"Calvin knows that Taylor is the woman for him," the insider added. "Out of all of Calvin's relationships, he seems the happiest with Taylor. He always says to all of his friends that Taylor is marriage material."

Swift and Harris started seeing each other after they first met at the Elle Style awards on Feb. 24, 2015. The couple made their first public appearance together about a month later and were spotted showing major PDA over the next few months until Swift officially confirmed that they were dating on social media.