Jon Voight has branded rumours of an impending split between his daughter Angelina Jolie and Brad Pitt as "nonsense".

The Oscar-winning actor - who has a notoriously difficult relationship with Jolie - insists the couple are staying together and there is no truth in the recent claims suggesting otherwise.

When quizzed about the break-up rumours, Voight replied: "Nonsense. It’s all made up stuff."

At the weekend, it was claimed Pitt and Jolie, who raise six children together, were set to separate after signing legal papers which equally split their $US330 million ($369 million) fortune and custody of the kids.

However, sources say that, while the couple, who have been dating for five years, did sign the papers, they did so only as a precaution.

One source told Life and Style magazine: "Brad and Angelina had a meeting with a top law firm in Los Angeles in December, where they worked out terms of a legal document similar to a pre-nup.

The couple signed the document in early January. They agreed to share their money and assets and custody of their six children, all of whom would live with Angelina in the event of their parents’ break-up."

But those close to the couple are adamant they have no intention of separating.