He seems to have decent acting chops. His character in the John Carpenter movie Ghosts of Mars was originally written to be as Snake Plissken, because Kurt Russell and Carpenter wanted to do an Escape From trilogy (and still do) and was originally titled Escape From Earth. Another rapper with a little onscreen presence is LL Cool J (SEE: Deep Blue Sea).
You’re thinking of Ice Cube (O’Shea Jackson) for Ghosts of Mars.