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Sienna Miller in Marchesa arrives at the 64th Annual Golden Globe Awards at the Beverly Hilton on January 15, 2007

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:( INTWOS (42A: How promgoers typically arrive) this answer is bad and also many many promgoers these days arrive uncoupled, as parts of groups, so maybe stick with Noah's Ark if you have to have this not-great bit of fill in your grid OMG (7D: "Wowie!," to Gen Z) I guess they used to say "Wowie!" back when they TOG ged up to go to prom exclusively INTWOS

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