50 Cent is really taking his stint as a Hollywood actor seriously. He's so adamant at fitting each role to a "T" that he's lost a significant amount of weight for an upcoming film role.

In these photos, posted at ThisIs50.com, you can see Fif' has slimmed down ... A LOT!

The rapper/actor reportedly lost around 50+ pounds for his role in the upcoming "Things Fall Apart," where he plays a football player diagnosed with cancer.

According to ThisIs50.com, 50 Cent dropped from 214 pounds to a shocking 160 for the role, thanks to a liquid diet and three-hour-day treadmill walk over the span of nine weeks.

"I was starving," he said of the grueling diet. But, now that he's back on tour, he says he's putting the weight back on quickly.

"I've been eating. I'll be back in shape in no time!"

"Things Fall Apart" will be released through 50's own, Cheetah Vision Films, a company he runs with partner Randall Emmett.

50 will play the starring role, and also co-wrote the script with Brian Miller. Mario Van Peebles will direct.

At press time, it was unknown how far along the film was in production and/or its release date.