Rita Ora apparently feels "betrayed" by Taylor Swift.

The 24-year-old Brit started dating Calvin Harris in 2013 but last year he took to Twitter to reveal their relationship had come to an end. It's now believed the DJ has moved on with 25-year-old Taylor, with pictures of the two out and about stirring up the rumours.

According to British magazine Star, his ex is not taking the news well, even though she's currently loved up with new beau Ricky Hil.

"Rita had heard Calvin was dating Taylor, but she didn't believe it until she saw the pictures of them together," a source explained to the UK magazine.

"She's hung out with Taylor before and, although they weren't close friends, they were pally, so Rita feels betrayed. She's joked to her mates that the pair are made for each other."

It's thought things didn't end well between Rita and Calvin - he even stopped her from performing their joint song I Will Never Let You Down.

The singer has previously opened up about her life in the limelight and the difficulties it poses for her friendships.

"It’s been mental. Not that I’m complaining, but you start seeing things around you change, and people you’ve known for years begin acting weird. You find out who your real friends are," Rita sighed to the Australian edition of GQ magazine.