So far, Amber Riley and Mark Salling have been confirmed to return to the milestone episode.
The original cast members of "Glee" may reunite for a 100th episode. Series creator Ryan Murphy has extended an invitation for the show's alumni to celebrate the milestone in the upcoming outing set to air March 18, 2014.
"ALL The Glee Originals received invites today to be in our 100th episode! More to follow," so Murphy tweeted on Tuesday, December 3. Just a few hours later, two stars, Amber Riley and Mark Salling, have already signed up to return to the show for the special occasion.
"Amber is IN for episode 100! More to follow...," Murphy posted. He followed it up with another tweet which read, "Mark is IN for the 100th! More great news coming..."
The invites sent out by Murphy brush off rumors that Dianna Agron wasn't welcomed back to the show. The Quinn Fabray depicter was absent from the Cory Monteith tribute episode, prompting speculation that there was a rift in the cast.
The actress, however, denied it. "I've nothing but love for that show and everybody involved in it. It was such a huge part of my life, so I think it's equally hard when I'm not there every day anymore," she said.
For the 100th episode, "Glee" has asked fans to choose which songs to be featured in it. Gleeks can choose 10 among 30 songs featured on the list on Fox.com/GleeksChoice or Facebook.com/Glee. Voting closes on December 3. The Top 10-voted songs will be remixed and performed in the said outing.