Irvine Welsh has ideas for another 'Trainspotting' film and a spin-off.
The Scottish novelist wants to complete the "Holy Trinity" by making a third movie and also revealed that he would like to do a spin-off based around Begbie, Robert Carlyle's violent character.
Irvine's book was brought to life on the big screen by Danny Boyle in 1996, with Ewan McGregor (Mark Renton), Ewan Bremner (Spud), Johnny Lee Miller (Sick Boy) and Robert's Begbie starring as a group of Edinburgh drug addicts.
A sequel, 'T2 Trainspotting', was released in 2017, but Irvine feels there is unfinished business.
Speaking on the 'Anything Goes' podcast with James English, he said: "You think the 'Godfather III', 'Terminator III' - there's the temptation to do the Holy Trinity, it might evoke Danny's inner Catholic."
Irvine admitted that it took a while to pluck up the courage to make a sequel and they can't spend too long waiting to make a third film.
He said: "It took us long enough to work up the bottle to do number two. They'll all be in the rest home by the time we had the bottle to do number three.
"We'd have to get moving on it pretty quickly. But it's something that would be massively interesting to me."
The author also revealed that he would like to do a stand-alone film on 'Begbie'.
He wrote a novel based on the character in 2016 and wants to see him on the big screen again.
He said: "The one I would like to do is a Begbie stand-alone. Just a short 90-minute film of Robert Carlyle going nuts."