It is being widely reported that controversial celebrity biographer Andrew Morton is writing a book about Angelina Jolie that claims the actress slept with her mom Marcheline Bertrand's live-in lover when she was just 16, destroying the relationship in the process.

There's just one problem with the story: It's just not true, Morton tells Life & Style.

Morton is writing a bio of Angie, and while he's not revealing specifics, if it's like his previous books about Tom Cruise, Princess Diana and other celebs, it's sure to include some shocking details.

Morton tells Life & Style that his latest project will definitely not accuse Angelina of her of sleeping with her mom's lover.

The report is false, says Morton. "It's about as true as I'm sitting on this horse."

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