The Sopranos originally ran for six seasons, ending in 2006.
David Chase is working on the new script with Sopranos scriptwriter Lawrence Konner.
The new movie will be based in the 1960s and has the working title 'The Many Saints of Newark'.
It's understood that this new movie will focus on some of the older characters from the TV series in their formative years, including Tony Sopranos' father and mother.
"David is a masterful storyteller and we, along with our colleagues at HBO, are thrilled that he has decided to revisit, and enlarge, the Soprano universe in a feature film," said Toby Emmerich, the chairperson of Warner Bros Pictures Group.