Malin Akerman, the first time we ever noticed her, in Harold & Kumar Go to White Castle (2004)
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A few months before that film, Malin appeared topless in the 2003 Abercrombie & Fitch catalog, but she was an unknown at the time.
She had a topless scene in Watchmen (2009)
She got VERY friendly with Kate Micucci in episode six of Easy