Being that Glee is a television show that is rapidly growing in popularity, there are many big celebrities that are vying to be on. Most recently, Gwyneth Paltrow and John Stamos have had multiple guest appearances on the show. Paltrow plays a substitute teacher who stirs up some romance with leading man Will Schuester, while Stamos is Miss Pillsbury's love interest and Will's rival. Britney Spears was honored by the cast performing a whole episode that featured her songs, and Olivia Newton John performed her hit "Physical" with Sue Sylvester. It's been rumored that in the near future Katy Perry will make a guest appearance.
No.
Jamie Campbell who plays Caius in New Moon says that he wants to be the next guest star on glee.
Nobody knows but he could be on Glee as a guest star soon though Maybe he could.
Austin Butler was never in Glee. However, he does look like Chord Overstreet, who plays Sam.
Idina Menzel (the original Moreen) playes Shelby Corcoran, the mother of Rachel Berry
An unknown guest star. The Characters Rachel and Finn
Kristin Chenoweth was in Episode 5 "The Rhodes not Taken" and she performed "Last Name".
Roger Moore
Destinee & Paris.
There have been multiple guest stars on Glee, including Gwyneth Paltrow, Kristen Chenoweth, Patty Palone and many more.
No way is Taylor dating a glee, star he is single for the moment!
The rumor is Miranda Cosgrove or Jennette McCurdy will guest star on the hit comedy series, but remember this is just a rumor, so it might not be true.