Tyler and Cameron Winklevoss, made famous by Armie Hammer's portrayal of them in David Fincher's The Social Network, took home a $65 million settlement in 2008 when they sued Facebook's Mark Zuckerberg for stealing their idea. But now they believe they're entitled to more and have launched another lawsuit against the social networking giant.

Facebook has rebuffed their claims and says in legal papers that the 29-year-old twins, famously labelled the 'Winklevii' in the film The Social Network, 'suffered a bout of settlers' remorse' after the original deal.

The prospect of the acrimonious row spilling out in public again would be acutely embarrassing for Zuckerberg and Facebook.

His supposed betrayal featured in the blockbuster film which dramatised the events surrounding the birth of the website.

Under fire: The twins accuse Mark Zuckerberg, above, of stealing the idea for Facebook from them in 2003

The latest legal papers filed at the United States District Court for the Northern District of California, say the case threatens to end in 'scorched Earth' litigation should it go before a judge.

Facebook's filing claims that the original settlement agreement 'is enforceable because it clearly communicated the parties' intention to be bound and the terms were definite.'

Read the full story at the Daily Mail.

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