According to The Sun, Rob has now unfollowed the Shine Ya Light singer on Twitter and has removed all photos of Ora on Instagram.
A source told the tabloid: "It’s really sad — they really liked each other but with him living in LA and her over in London, it was becoming impossible to maintain a relationship.
“They’d only decided to go public with the romance a couple of months ago so as not to put any pressure on themselves but they’ve already split. Rob has now deleted everything on Twitter that reminds him of Rita.”
Rob was apparently due to attend Ora's birthday bash in London last week, but the pair are thought to have broken up before hand after having 'serious talks'.
During a recent interview with Glamour magazine, the R.I.P. hitmaker seemed to hint at her break up with Rob, admitting she's still on the look out for her first love.
She told the mag: "In 22 years, there’s been nothing. I’ve had young fascinations but never love.
"I think it’s my only weakness. I’m scared of letting my guard down, and if I fell in love with someone now, he’d have to try ten times harder to break it down."
When asked about Kardashian, the star added: "He’s a great friend. But the only relationship I’m having now is with the tour bus."