They always say, don't get back with your ex, you'll soon regret it. It looks like that age-old proverb is proving true for Hollywood's former golden couple of Robert Pattinson and Kristen Stewart, as reports are surfacing that the pair's relationship is on the rocks.

The pair spent New Years in London, and despite coming to the British capital with the best of intentions, things have apparently gotten very shaky between the two, with Rob still ruing over the heartbreak he suffered after Kristen's much publicised affair with director Rupert Sanders. Speaking to Life & Style magazine, one source close with the pair has revealed that the two have been fighting a lot whilst in the capital, saying: "Things with them aren’t good."

The twosome looked to be done and dusted after Rob walked out on his cheating other half last year, but they then ended up reconciling with each other a few months after the split, but alas, things aren't going as well as they'd hoped. The source goes on to add: “Rob isn’t happy. It’s just a matter of time before he ends this. [Rob] is at a point where he sometimes ignores her.”

Whilst things are looking bleak now, friends of the pair have said that their reconciliation has yet to be truly tested, with their busy and (with the end of the Twilight film series) conflicting filming schedules coming up, it may only be a matter of time before they decide to call it quits for good.