(Youre klaus)

Klaus and Hayley first met in The Rager, when Hayley came to Mystic Falls to visit Tyler Lockwood, whom she helped to break his sire bond. Klaus initially believed her to be someone with whom Tyler had a fling while they were in the Appalachians, a misconception that Tyler and Hayley encouraged to cover up their plans to help the rest of Klaus' hybrids break their sire bonds. It was later revealed that Hayley was working with Shane, who promised her information on her true parentage in exchange for her help in manipulating Klaus into murdering his hybrids.

Hayley returned to Mystic Falls in Bring It On, during which Klaus tried to obtain information from her about Katherine Pierce.