The 'Trainspotting' sequel will start filming next summer.

Danny Boyle - who directed the original movie in 1996 - has revealed plans to make the much-discussed sequel have gathered pace over the last few weeks and with filming set to begin in the middle of next year, the movie could even hit cinemas before the end of 2016.

The director - who'll once again work with Ewan McGregor, Johnny Lee Miller, Ewen Bremner and Robert Carlyle - said: ''They only get this little window off, so either you wait for the contract to run down, which could be as late as three years, or you kind of try and do it in this window.

''But all four lads are back in.''

Although the budget for the new movie is substantially higher than the original, Danny insisted he'll still have creative control over the project.

He told The Hollywood Reporter: ''We're doing it for less than $20 million, and that'll give us control of the film so we can make the film we want to make.

''That's as much as you can get without being answerable to anybody. You can sort of get on with it without much interference.

''Although we could have raised a lot more money for this, we didn't so we're trying to keep some sense like we kept the original.''