'Glee' stars Cory Monteith and Lea Michele.

Musical sensation Susan Boyle is set to appear on FOX’s ‘Glee’.

The ‘Britian’s Got Talent’ runner-up will feature in a Christmas-themed episode, playing a high school lunch lady.

Rumours began to circulate earlier this year of Boyle’s appearance, but the news was recently conformed by show’s co-creator/executive producer Ryan Murphy.

Also set to appear next season is Emmy Award-winner Carol Burnett, who’s been tapped to play Sue Sylvester’s adventurous mother.

The comedy legend, who’s only made a couple of TV appearances in recent years (including a stint on ‘Desperate Housewives’), will make her first appearance around October or November in the States.

Meanwhile, the music of Paul McCartney is set to be featured in the growing list of tracks used in the hit musical comedy series.

The former Beatle sent Murphy a couple of CDs a few weeks ago, with a note suggesting some songs be used in the show.

“I thought I was being punked!,” said Murphy.

“It came out of blue in a package, handwritten, and it had two CDs and it said ‘Hi Ryan, I hope you will consider some of these songs for Glee’ … I had heard that he is a fan of the show. I was gob-smacked … so of course we are going to do something with him.”

Finally, the cast of ‘Glee’ are set to lend their voices for the upcoming season premiere of ‘The Simpsons’.

In the episode, entitled ‘Elementary School Musical’, Lisa will attend a performing arts camp where she’ll be joined by fellow campers (voiced by the ‘Glee’ cast).

The episode will go to air September 26 on FOX in the States.

Source: Entertainment Weekly, SMH, Digital Spy