The acclaimed Iranian filmmaker Jafar Panahi was sentenced to six years in prison today, and banned from directing and producing films for the next 20 years, his lawyer said.Panahi, an outspoken supporter of Iran's opposition green movement, was convicted of gathering, colluding and propaganda against the regime, Farideh Gheyrat told the Iranian state news agency Isna."He is therefore sentenced to six years in prison and also he is banned for 20 years from making any films, writing any scripts, travelling abroad and also giving any interviews to the media including foreign and domestic news organisations," she said. Gheyrat said she would appeal against the conviction.Panahi won the Camera d'Or award at the Cannes film festival in 1995 for his debut feature, The White Balloon , and took the Golden Lion prize at Venice for his 2000 drama,