When Rey grabs the light saber for the first time, if you listen carefully, you can hear the sentence, "Rey, these are your first steps." The voice saying the "Rey" part is none other than Sir Alec Guinness, dead since 2000. They edited his voice saying "afraid" from the original movies to gain the "Rey." The rest of the sentence was voiced by Ewan MacGregor, the second Obi Wan.
Pretty cool that was.