Jennifer Aniston is said to be worried that Friends co-star Matthew Perry's up-coming tell-all book will reveal personal details about her failed romance with Brad Pitt.
The actor, who played Chandler Bing in the iconic sitcom, has revealed his memoir titled Friends, Lovers, and the Big Terrible Thing is set to be released in November this year.
Announcing the news to his 7.8 million Instagram followers earlier this month, Matthew said: " So much has been written about me in the past. I thought it was time people heard from me. The highs were high, the lows were low.
"But I have lived to tell the tale, even though at times it looked like I wouldn’t. And it’s all in here. I apologize it’s not a pop up book."
And now Jennifer, who starred as Rachel Green, is reportedly anxious that his book could spill secrets surrounding her failed marriage to fellow Hollywood star Brad.
An insider told C loser Magazine the actress is nervous about what will be included in the book in order to help it be number one top seller.
Jennifer and Brad's divorce came a year after Friends finished as fell for Angelina Jolie as the pair filmed Mr & Mrs Smith in 2004.
However, the insider said: she is anxious and "with good reason" with how much Matthew knows about the situation.
They continued: "He hasn’t suggested that the book will include private details about anyone else, but Jen knows Matthew will want a bestseller and, to achieve that, he’ll need to expose as many juicy secrets as possible.
"And being privy to one of the most high-profile showbiz splits in history, he knows that will be something everyone will want to know about."
But they confessed that they have tried to calm Jennifer down, insisted Matthew "would never betray her" despite the pair growing apart in recent years.
"She is acutely aware that she’s barely spoken to him over the last few years and that close bond they shared has very much dissipated," they added.
During the Friends Reunion show last year, the cast - which also included David Schwimmer, Lisa Kudrow and Matt Le Blanc - admitted they became "inseparable" as they lived in each other’s pockets for the 10 years they were on screen together.
But a source close to Matthew told US Weekly at the weekend that he is set to "clear up rumours" surrounding his relationships with his co-stars.
The source said: "It wasn't always a bed of roses for Matthew on and off the Friends set. He'll also discuss what it was like at the reunion, both good and bad."
