Boys night at the Chateau Marmont for JUSTIN LONG ("Accepted"/"Herbie Fully Loaded") and JONAH HILL ("Superbad") turned into a full-blown party April 18 when British actress SIENNA MILLER joined their group. She flirted with Justin all night. Wonder what her boyfriend RHYS IFANS and Justin's lady, DREW BARRYMORE, would think about that!

• TYRA TAKES THE CAKE!
• JENNA FISCHER DOES PALIN IMPRESSION
• "FRIENDS" STAR DUCKS FAN ENCOUNTER
• BOYS NIGHT OUT!
• EVA FUELS BABY RUMORS
• KAT'S DAD EMBARESSES HER!
• RYAN GIVES HIS GIRL THE BRUSH-OFF
• LEO & BAR: STILL GOING STRONG
• SHANNEN RAISES SOME HELL OVER HER HAIR

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