Jonah Hill is pulling a Christian Bale -- and is losing some serious weight for a new movie role!
The "Superbad" star is on a mission to drop 30 .lbs for his role in the upcoming film remake of "21 Jump Street" ... and judging by recent photos of the actor, he's well on his way to reaching that goal.
Hill reportedly tried going on a diet but gained weight -- so he eventually got himself a nutritionist and a trainer to help him slim down.
A friend tells Us Weekly Jonah "now looks better and feels better!"
Check out the gallery above to see Jonah's transition!
