Rachel McAdams & Michael Sheen Split?

Rachel McAdams and Michael Sheen have ended their relationship after two years together, it has been reported.

The couple, who went public with their romance in October 2010, are said to have called time on their romance, according to Usmagazine.com.

Rachel, 34, and 44-year-old British actor Michael first met when they worked together on Woody Allen's critically-acclaimed Midnight In Paris.

The reasons behind the reported break-up are as yet unknown.

Speaking previously about the relationship, Rachel had said that while the long-distance aspect of their romance was difficult, they did their best to manage it.

Rachel lives in Toronto, Canada, while Michael divides his time between his native Wales and Los Angeles.

Happier times: The couple were last seen together at the airport in November 2011

The benefits of working together: Michael and Rachel began dating after meeting on the set of Woody Allen's movie Midnight In Paris, released in 2011

She said: 'Michael and I never spend more than three weeks apart - we rack up a lot of air miles - but you have to be quite adaptable in this business whether you are in a relationship or not.

'Trying to establish roots somewhere is a bit of a joke.'

Rachel added that the key to the couple's successful relationship is communication, adding: 'You need to trust each other and be able to talk to each other and be best friends.'

Meanwhile, Michael has previously said that Rachel is a 'genuinely lovely lady, as well as being stunningly beautiful and very talented.'

However their relationship was not all been plain sailing, as Michael revealed he quit Twitter last October because of cruel comments about why such a beautiful woman would date him.

He said at the time: 'I don’t need to read those things. It was just abuse, people writing stupid things, as people do.

'On the one hand Twitter gives you the opportunity to engage with people, which is great, but on the other there are people who feel they can say whatever they want, put poison out there, really, without fear of any repercussions.'

While Michael has a 14-year-old daughter Lily from his eight-year relationship with Kate Beckinsale, Rachel's most famous former romance was with Ryan Gosling, to whom she was briefly engaged before their split in 2007.

MailOnline has contacted Michael and Rachel's representatives for comment on the split reports.