Glee stars Heather Morris, Mark Salling, Amber Riley and Harry Shum Jr will not be returning to the popular series in season five.

The actors, who play Brittany, Puck, Mercedes and Mike respectively, will no longer have major roles in the musical comedy-drama, according to TV Line.

However, it has been suggested that the quartet may return as occasional guest stars.

Meanwhile, Chris Colfer, who plays Kurt Hummel, has insisted that he has no plans to leave the show in the near future.

He said: ''I'm definitely the youngest cast member so I'm hoping to have more time ahead. We'll see.''

Colfer added: ''I think I'm very blessed to be able to play that role [Kurt] on the show because I know it has helped a lot of kids around the world. He's a character that means so much to people who relate to him and are inspired by him.''