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    This undated publicity photo provided by United Artists and Danjaq, LLC shows Ursula Andress in a scene from the James Bond 1962 film, "Dr. No." When Ursula Andress emerged from the sea, curves glistening, with a dagger strapped to her bikini in 1962's “Dr. No,” she made the Bond girl an instant icon. The film is included in the MGM and 20th Century Fox Home Entertainment Blu-Ray "Bond 50" anniversary set. (AP Photo/United Artists and Danjaq, LLC)

    The evolution of the 'Bond girl'

    Who qualifies as a Bond girl has changed over the years, as the

    blue-eyed, buxom blonde has given way to more diverse leading ladies,

    including Michelle Yeoh ("Tomorrow Never Dies") and Halle Berry ("Die Another Day"). Modern Bond girls also present a more formidable challenge to the suave secret agent.