Graynor played Elvina, a pop star, in CSI: Miami, and was a recurring guest star on the Fox series Fringe, playing Agent Olivia Dunham's younger sister, Rachel. In 2008, Graynor appeared in the film Nick and Norah's Infinite Playlist, and in October 2009, she also was in Whip It, a comedy film directed by Drew Barrymore and written by Shauna Cross, based on Cross' young adult novel Derby Girl.