Diddy Desperately Seeking Sienna

HARVEY'S WORLD Fashion Rule #37: Never wear a leather jacket indoors. Fashion Rule #37A: Unless you're attending a party you threw in honor of a movie you paid for When it comes to hooking up with Sienna Miller, timing is everything. Just ask Diddy, who showed up at the Factory Girl afterparty at the Chelsea Hotel's Star Room last night looking for his new tabloid "friend," only to discover that she'd already left with co-star Jack (Anjelica's nephew) Huston.

"He pretty much bounced after he realized she wasn't there," says a fellow partygoer. While it's unclear where a dejected Diddy went after, safe to say he didn't make it home for storytime with the twins.

After the jump, more Factory Girl gallivanting from Harvey Weinstein, Anna Wintour, and those scowling MisShapes.