Um, Jonah Hill, Your Fly Is Down (PHOTOS)

It looks like Jonah Hill forget to check his barn door before leaving his house yesterday morning.

The rotund Superbad actor was in New York City promoting his new film, Get Him To The Greek. While Jonah clearly made an effort to look dapper and cool with his suit and retro specs, his cool dude look is clearly killed with his zipper left down.

Click here for more photos and check out all our paparazzi snaps over at Paparazzi-Razzi.

Tags: Jonah Hill