The pair posed together in an inflatable swan, while they soaked up the sun in an infinity pool, sharing their first picture as a couple on the photo-sharing site.
After months of speculation, the singer and DJ went public with their romance last month at the Billboard Music Awards, and have been spotted together on numerous occasions since.
However, this snap marks the first time Taylor has acknowledged her new beau on social media.
“Swan goals," she captioned the photo.
Taylor and Calvin went public last month
She told The Sun: “Calvin is a really great mate and he’s so fantastic, and Taylor is such a cool person who I love. I thought, ‘They’re both really awesome and both really tall, they’ll be brilliant together’.”
And by the looks of things, their relationship is going swimmingly.