The Clueless star passed away on 20 December (09) after suffering a cardiac arrest at her Hollywood Hills home.
She finished shooting psychological thriller Abandoned in June last year (09) with co-stars Dean Cain and Mimi Rogers - in which she plays a woman who receives a ransom demand after her boyfriend mysteriously disappears.
Distribution company Anchor Bay Entertainment has now bought the rights to the film for a North American release, bringing Murphy back to the big screen months after her death.
A statement from producers Jeffrey Schenck and Barry Barnholtz reads: "Brittany will be deeply missed by everyone who worked on Abandoned. The film is a taut thriller which portrays Brittany's character as smart and tough - and that's how we all want to remember her."
Earlier this month (Feb10), the Los Angeles County Coroner's Office ruled Murphy's death was accidental, and was caused by pneumonia, with contributing factors of anaemia and "multiple drug intoxication".