The Oscar-winning director’s 32-year-old son has been training for three years for the role

Ang Lee has cast his son Mason Lee as Bruce Lee in a new biopic.

The Oscar-winning film-maker of Life of Pi and Brokeback Mountain has taken on a project that has already seen four writers deliver different versions of the script. The latest rewrite will come from the Oscar-nominated Capote screenwriter Dan Futterman.