Downloading The Green Mile (1999) from (TPB) or other torrent sites is illegal because it involves unauthorized distribution of copyrighted material. Engaging in torrenting also makes you a "seeder" or uploader, which can lead to legal action from copyright holders, potential fines of up to $250,000, or internet service suspension by your ISP.
For those interested in watching The Green Mile, there are several alternative options:
A list of its 4 Oscar nominations (including Best Picture) to highlight its prestige.