Director Roman Polanski is finishing his latest film from jail, according to screenwriter Robert Harris.

Speaking at the Cheltenham Literature Festival, Harris said Polanski wanted to finish The Ghost in time for next February's Berlin Film Festival.

"He can make his wishes known from his cell. I don't think he can make phone calls but he can communicate," he said.

Polanski was arrested in Switzerland last month over his 1977 conviction for unlawful sex with a 13-year-old girl.

He left the US in 1978 before he could be sentenced and has never returned.

Source: Press Release