The movie star, who hit the high notes for "Duets" and her new movie "Country Strong", will show off her singing skills on the TV hit, in which she'll play a love interest for Matthew Morrison's teacher character Will Schuester.
According to E! Online, Paltrow will play a substitute teacher in two episodes airing in November - and she'll take over the Glee club.
A source tells the publication, "The kids love her, and Will starts to fall for her."
Paltrow won't be the only big name set for a Glee guest spot - Javier Bardem and Britney Spears will also appear on the show this coming season.