'Bee Gees' the pop group that was the sound of the 70's,will soon be the stars of a bio-pic and the helmer of the film is none other than Steven Spielberg. The Oscar-winning director of 'ET' believes the "Stayin' Alive" hitmakers journey from unknowns in Manchester to worldwide fame will prove box-office gold,reported Daily Mail online. British-born twins Maurice and Robin Gibb and their older brother Barry,64,sold more than 200 million records. Maurice died suddenly in 2003 aged 53 but the two remaining brothers have recently said they will perform again. "The movie is going to be done by some very important people. It will be our life story. Barry and I will be involved in the technical side," said Robin,60. One of the challenges for Spielberg,63,will be replicating the brothers' distinctive three-part harmonies and Barry's falsetto voice. "I'd like our original recordings to be used because it's very hard to emulate them," said Robin. The film will chart the brothers' rise from child performers. They had their breakthrough in 1966 with Spics And Specs before hits including "Jive Talkin'" and "Stayin' Alive".