Oscar-nominated screenwriter Patrick Marber has reportedly been hired to rework the script for the movie adaptation of E.L. James' bestseller Fifty Shades Of Grey two days after Charlie Hunnam quit as leading man Christian Grey.

Sources tell The Hollywood Reporter Marber joined the project on Friday (11Oct13), but there is no direct link to his involvement and Hunnam's departure the following day.

Insiders claim producers and director Sam Taylor-Johnson are still planning to start shooting on the film next month (Nov13), suggesting that they already have a replacement for Hunnam in mind.

British star Jamie Dornen and Alexander Skarsgard have emerged as frontrunners, while Ian Somerhalder and Matt Bomer remain fan favourites for the role.

Announcing the news Hunnam was no longer attached to the Fifty Shades film on Saturday, executives at Universal Pictures released a statement that read: "The filmmakers of Fifty Shades of Grey and Charlie Hunnam have agreed to find another male lead given Hunnam’s immersive Tv schedule which is not allowing him time to adequately prepare for the role of Christian Grey."