Nancy Drew has in several books interacted with the sleuthing brothers Frank and Joe Hardy. In the original Nancy Drew novels, Nancy was connected to the Hardy brothers because a close friend of hers, Karen Young, was a cousin-in-law of the Hardy Boys (Karen was the daughter of a sibling of Janet Hardy, who was married to the Hardy Boy's father's brother).


The Hardys also interacted with Nancy in certain episodes of the television series The Hardy Boys/Nancy Drew Mysteries.


  • Frank Hardy and Nancy Drew are sometimes romantically linked and implied to have feelings for each other, more so in Frank's case towards Nancy.