Robert Pattinson dating FKA Twigs has been attributed as the main reason why the "Twilight" star plans on returning to London and live in with his new girlfriend.

The article from British Grazia magazine, according to MailOnline, claimed that Robert Pattinson dating FKA Twigs is no ordinary fling.

"She is behind Rob's decision to move back. He's serious about her," the source said. "They are really happy and he seems keen to make a fresh start, away from the mutual circles he shared with his ex-girlfriend Kristen [Stewart] in LA."

The source said that even if they both got busy schedules, they are planning to live in London "in the foreseeable future."

The decision to move back to London could be prompted by the rumors involving the actor and his ex, Kristen Stewart, which just won't die even after Robert Pattinson is dating FKA Twigs.

"There were plenty of rumors about how Rob was still pining for Kristen and planning on dating her in Toronto, or vice versa," said Celebrity Dirty Laundry. "At the time, we heard that FKA Twigs couldn't give a rat's ass, but the rumors are getting louder and louder."

But speaking to the UK's Independent, Robert Pattinson said that he might be done with living in the Los Angeles and is looking to move back.

"I think I need to spend more time in London, or just move around a bit more. I've been in LA for six or seven years or something and it's weird," he said. "The more you stay there, especially as an actor, the more you think you need to be there, that you'll be missing out on something by leaving, but you are not really."

"It's a fun city, though, but you are permanently on holiday there. I feel like I've been on holiday there since I was 22," Robert Pattinson added.