Funnyman Jonah Hill was falling under the umbrella of the Chris Farleys and John Candys of the world: funny and, well, full-figured.

But now the Superbad star is transforming a la his good friend Seth Rogen; Hill has lost 30 lbs for his role in the new 21 Jump Street movie.

He barely looks like the same person!

Wednesday Hill tweeted this pic of himself looking very dapper on set. He noted that hottie co-star Channing Tatum snapped the pic.

Maybe Hill wanted to make himself look spiffy next to Tatum.

He's also co-starring with another mega-hottie superstar soon; see who after the jump!