It was announced yesterday (July 23) that Terra Nova actor Dean Geyer has been cast as NYADA student Brody, who Michele explained is "not going to give up" his pursuit of Rachel as she pines for her ex-boyfriend.
"He's definitely interested in her, but I think that she is very hesitant because she doesn't really know where things stand with Finn," Michele told The Hollywood Reporter.
"She doesn't want to make any moves before she knows where they stand and Brody's not going to give up."
Michele also teased that Rachel's new roommate in New York will make an attention-grabbing debut.
"You see Rachel for the first time in her bed, covering her ears from the sex noises that her roommate is making and you never see the roommate - as of now - you can just hear her," she revealed.
Glee's fourth season will premiere September 13 on Fox. The show airs in the UK on Sky1.