George Clooney has rejected an apology from the Daily Mail over an untrue story they printed about his fiancée's family, saying it was "a premeditated lie".

The Hollywood star released a statement in which he accused the Mail Online of "inciting violence" after they published a story claiming that the mother of his fiancée Amal Alamuddin opposed her daughter marrying outside of the Druze religion.

The publication this week (July 9) apologised for the story, but claimed that it was "supplied in good faith" and based on "conversations with a long-standing contact".

However, the actor today responded to the Mail's statement in an article in USA Today, in which he suggested that the UK tabloid lied about its sources.

He wrote: "There is one constant when a person or company is caught doing something wrong. The cover-up is always worse.

"The original story never cites [the] source, but instead goes out of its way to insist on four different occasions that 'a family friend' spoke directly to the Mail. A 'family friend' was the source. So either they were lying originally or they're lying now."

He added: "What separates this from all of the ridiculous things the Mail makes up is that now, by their own admission, it can be proved to be a lie. In fact, a premeditated lie.

"I thank the Mail for its apology. Not that I would ever accept it, but because in doing so they've exposed themselves as the worst kind of tabloid.

"One that makes up its facts to the detriment of its readers and to all the publications that blindly reprint them."