After a gajillion and a half screenings and press junkets, the Iron Man movie finally had its official premiere last night in Los Angeles. And. Um. How best to phrase this? Well: Gwyneth Paltrow wore a jumpsuit. Yes, a jumpsuit. (See left; larger image after the jump.) Fortunately, the movie's lead, Robert Downey, Jr., stepped it up: He and wife Susan both embodied old-school Hollywood style. Who else was there? Funny you should ask: Ben Stiller and Christine Taylor, Billy Corgan (!), Emmanuelle Chirqui, Jennifer Grey (!!), Sean "Diddy" Combs, Beau Bridges, Pete Wentz, Terrence "Baby Wipes" Howard, Vince Vaughn, Jack Black, Rosanna Arquette and more. The Good, the Bad, and the Ugly, all after the jump.

The Good:
Robert Downey, Jr. and his wife Susan look like an old-time glamor couple from the Hollywood of yore.

Ben Stiller looks sharp in his dark suit (even if he's almost doing "Blue Steel" here) and Christine Taylor rocks the naught secretary look.

Whoah: It's Billy Corgan. He can wear whatever the fuck he wants. Especially when it involves a stripey shrirt, cropped pants, and a hat.

Emmanuelle Chirqui makes it okay to wear white after Labor Day.

No one puts Baby in the corner.

Leslie Bibb makes the one-shoulder dress look completely novel, not to mention sexy-yet-classy.

Nazanin Boniadi's dress has to be Rami Kashou, right?!

Sean Combs must be giving his outfit for this year's White Party a partial test-run.

The Bad:

Gwyneth Paltrow is wearing a jumper. How Studio 54 of her.

Beau Bridges and Wendy Treece: Did they just step out of a time machine? I know I saw these looks at my cousin's Bat Mitzvah in 1989.

Jenna Dewan's dress has good ideas. But something went terribly wrong in its execution.

I really have no patience for Pete Wentz and his "style." Also, is that a sweater vest I spy?

Same goes for Terrence Howard. But minus the sweater vest. Also, shouldn't he be carrying baby wipes?

Just not Vince Vaughn's finest hour.

The Ugly:
Oh blah blah blah I know that Jack Black is supposed to be all wacky and such, but he and wife Tanya Haden look like they're wearing their dirty laundry. From their time in the house-cleaning circus.

Courtney Hansen's dress is so wrong on so many different levels. But the shiny, too-tight booby trap up top and the piecemeal bottom seem to be the most insurmountable problems.

No, seriously: What is Rosanna Arquette wearing?

[Images via Getty.]