London, Jan 9 (ANI): Tom Cruise's lawyer has branded a new biography on the actor by Andrew Morton as 'outrageous' and 'nutty'.

In the book, Tom Cruise: An Unauthorised Biography, Morton claims that Cruise and now wife Katie Holmes' daughter Suri was conceived by sperm from dead Scientology founder L. Ron Hubbard.

Morton, who rose to fame with a biography on Princess Diana titled 'Diana: Her True Story', has based the book on interviews with high-ranking Scientologists, or Sea Orgs, as they are known.

In it, he says that Cruise is second-in-command at the controversial Church of Scientology.

Morton also claims that Cruise's ex wife Nicole Kidman was warned by Scientologists not to reveal details of her marriage to the actor as it would mean losing contact to their kids - Isabel and Connor.

Cruise's lawyer Bert Fields insisted that the tome was full of "tired old lies", and is completely "nutty".

"The man should be ashamed of himself and so should his publisher," the BBC quoted him, as saying.

"He pretends to be writing a biography without ever talking to anybody who has really known Tom for the past 30 years."

"Clearly the book is actionable, but I'm not commenting on anything to do with legal issues."

Cruise, for his part, has instructed his legal eagles to slap a whopping 50million pounds lawsuit on the publishers when the tome goes on sale in the US on January 15.

However, publishers St Martin's Press is standing by the tome.

"We stand by our book and our author," it said in a statement. (ANI)