Heather Morris is the latest of the original "Glee" cast to confirm their entry in the show's 100th episode.

Show creator Ryan Murphy revealed over his Twitter account Tuesday last week that 'ALL The Glee Originals received invites (today) to be in out 100th episode.' Apparently, the show plans to reunite the alumni and the current members of New Directions for its special episode.

The latest "Dancing with The Stars" winner Amber Riley was the first to RSVP on Murphy's invitation.Riley is set to reprise her role as Mercedes Jones, one of the group's resident divas alongside Rachel Berry (Lea Michele) and Santana Lopez (Naya Rivera). E! News is hoping that Riley also gets to show off her dancing moves of which she has just learned from DWTS.

Other former cast members followed suit soon after after Riley's confirmation. These include Mark Salling (who plays Noah 'Puck' Puckerman), Harry Shum, Jr. (aka Mike Chang) and Kristin Chenoweth (aka April Rhodes). Ryan Murphy confirmed the aforementioned stars' appearance in the special episode.

Last Wednesday, Murphy announced that Morris has confirmed her appearance to the special episode as well. Fans will be delighted for the return of Brittany S. Pearce who has not been seen from the show since the finale of season four. This was due to Heather's pregnancy and birth to her baby boy Elijah last September.

Fans of the show are still waiting for Dianna Agron's reply to the invitation. The actress who plays former school queen bee, Quinn Fabray was not seen from the show since the middle of the fourth season. Agron was also not present during the tribute episode to the late Cory Monteith. There were rumors of a supposed rift between Agron and the rest of the "Glee" cast but it was dismissed almost immediately.

Meanwhile, FOX has announced through an online initiative where fans can vote for the songs which they wish to be included in the remix. This will be done on "Glee's" 100th episode. Voters can choose up to 10 songs at a time and may submit them as often as they like.

Some of the choices include Rachel and Kurt's "Defying Gravity," Artie's "Safety Dance" and the New Direction's iconic rendition of "Don't Stop Believin'" which was featured in its pilot episode.