Director Danny Boyle broke the news on Facebook.
"We're up in Scotland filming Trainspotting 2 just now. I think what I love most about what I do is the variety, and being able to do something new every day. I get to meet such amazing people all the time.
"I feel very fortunate and grateful to be able to make films, and to be able to always have a choice in what I do. Coming back to Edinburgh has actually been really fascinating. Since filming the first Trainspotting, Edinburgh has changed dramatically. You can see the gentrification massively in the city," Boyle wrote.