Find Out Who's Returning for Glee's 100th Episode

Some familiar faces will be returning for Glee's 100th episode!

Heather Morris, Amber Riley, Mark Salling, Harry Shum Jr., Dianna Agron and Kristin Chenoweth have all signed on to reprise their roles on the Fox series, executive producer Ryan Murphy announced on Twitter.

"ALL The Glee Originals received invites today to be in our 100th episode! More to follow," Murphy initially tweeted on Tuesday, slowly doling out the names of those who have accepted the invitation so far.

Riley, Salling and Shum all appeared in the third episode of the season, which paid tribute to Finn and the late Cory Monteith. However, Morris hasn't been seen on the show since the end of Season 4, when her character abruptly left McKinley High and the New Directions to get an early start at MIT. Burning question: Will Lord Tubbington be back as well? Agron also hasn't appeared since Season 4, while Chenoweth's April Rhodes hasn't been seen since Season 2.

Which songs will be featured on Glee's 100th episode?

For Glee's big 100th episode, the show is allowing fans to vote on which songs the cast should perform during the hour. Viewers can choose from a pool of 30 songs that have been performed throughout the past five seasons. The top 10 songs will then be remixed and performed by the current members of the show's New Directions. You can see the full list here. Then, head here or here to cast your vote.

Glee's 100th episode airs on Tuesday, March 18 at 8/7c on Fox. Which other series alums do you want to see return for the special episode?