The duo have split after 15 months of dating, Billboard has confirmed news first reported by People.
The singer, 26, and the DJ and producer, 32, celebrated their first year together in March with a tropical vacation.
In April, Swift talked to Vogue about her relationship with Harris in a cover story interview, “I’m just taking things as they come. I’m in a magical relationship right now. And of course I want it to be ours, and low-key…this is the one thing that’s been mine about my personal life.”