Glee creator Ryan Murphy has revealed he has invited all of the original cast to feature in the upcoming 100th episode.

Murphy tweeted the news to fans to let them know he had asked all the stars from the first season of the all singing, all dancing show back to McKinley High for the special anniversary episode.

He wrote: "ALL The Glee Originals received invites today to be in our 100th episode! More to follow."

That means US Dancing With the Stars winner Amber Riley, Mark Salling, Dianna Agron, Harry Shum Jr. and new mother Heather Morris could all be back for the special show, which is set to air in the States next March.