Taylor Swift reveals anniversary gift from Calvin Harris

Gemma Strong

Taylor Swift took to Instagram on Sunday to reveal her sweet one-year anniversary gift from boyfriend Calvin Harris. The 26-year-old singer shared a close-up photo of a heart-shaped locket engraved with the date 3.6.15 – which finally confirms the couple did start dating in March last year – proudly writing in the caption, "One year down!"

The smitten couple also celebrated the landmark occasion with a special "one-year cake". Calvin, 32, shared a video on Snapchat showing off the sweet treat, which appears to have been made by the Scottish DJ and Taylor themselves. In the clip, Calvin says: "We got one year cake, it's one year. Yay," while Taylor nods and smiles.

3.6.15 One year down! ❤️

A photo posted by Taylor Swift (@taylorswift) on

Taylor Swift received a heart-shaped locket from boyfriend Calvin Harris

Their romance is clearly going from strength-to-strength; supportive Calvin recently shared a sweet snapshot on Instagram after Taylor won the Grammy for Best Album, which he captioned: "Congratulations to my beautiful girlfriend."

In fact, things are going so well for the pair that Calvin has "politely declined" the chance to work with Taylor, because he doesn't want to jeopardise their romance by making their relationship professional.

The couple also celebrated their anniversary with a home-made "one-year cake"

The musician – who previously worked with ex-girlfriend Rita Ora on her single I Will Never Let You Down – was reportedly advised to team up with Taylor on a new song, but turned it down.

A source told The Sun on Sunday newspaper: "Calvin's next single is ready but the label is keen for him to get a big female US star to collaborate on it. They know he attracts amazing names because everyone wants to work with him.

Taylor and Calvin are very much in love

"They floated the idea of him working with Taylor but he politely declined it.

"Calvin has seen how sour things can turn when working with someone he's dating. He is very serious about Taylor and doesn't want to rock the boat. He's smitten."