LIBERACE’s former lover Scott Thorson might not get to watch the “Behind the Candelabra” – the new HBO flick about the flamboyant pianist – because he’s back behind bars…again!

Thorson, 54, who wrote the book on which the new biopic is based, was arrested on Feb. 22 at the Pon­derosa Hotel in Reno, Nev., and charged with four counts of first-degree burglary.

Deputy District Attorney Rebecca Druckman told The ENQUIRER that Thorson – who now goes by the name Jess Marlow – found a wallet containing credit cards and used them at several Reno businesses.

Aftger he purchased some things, he checked into the hotel and the victim was notified that somebody was suspiciously using his credit cards,” said Druckman.

The cardholder went to the Pon­derosa and informed them of the fraud, and the police were called.

Thorson was arrested, booked and held on $125,000 bail. A subse­quent court hearing was scheduled for March 28. If convicted on the first-degree burglary charges, he could face several years in prison.

In 1988, a year after Liberace’s death from AIDS, Thorson penned the book “Behind the Candelabra: My Life With Liberace,” which documented his six-year romantic relationship with the flamboyant entertainer.

He said he learned that producer Jerry Weintraub was inter­ested in the work in 2008, when he was previously behind bars for a drug-related robbery. The film, which is scheduled to air in May, stars Matt Damon as Thorson and Michael Douglas as Liberace.

Thorson, who is suffering from anal cancer, claims he wasn’t appreciated by the filmmakers. He said he was snubbed by the cast and crew when he visited the set and received just a small amount of money for the use of the book.

“Now, Scott probably won’t be out of jail before the show airs,” added a friend. ”And if he goes to prison, he could die behind bars.”