Photo Flash: First Look at GLEE's 'Thanksgiving' Episode!

GLEE is a musical comedy about a group of eager and ambitious students who strive to outshine their singing competition to win Nationals while navigating the cruel halls of McKinley High. Since its debut, GLEE has become a bona fide cultural phenomenon, received prestigious honors including the Golden Globe and Peabody Award and singlehandedly made glee clubs cool again.

In addition to the regular cast, GLEE has featured guest appearances by a wide range of talented performers, including Gwyneth Paltrow (who won the 2011 Emmy Award for Outstanding Guest Actress in a Comedy Series), Carol Burnett, Kathy Griffin, Cheyenne Jackson, John Stamos, Britney Spears, Kristin Chenoweth, Idina Menzel, Jonathan Groff, Molly Shannon, Olivia Newton-John and Neil Patrick Harris, who won a 2010 Emmy Award for Outstanding Guest Actor in a Comedy Series for his work on the show.

 Photo Credit: FOX

Melissa Benoist

Blake Jenner,

Cast of GLEE

Cast of GLEE

Samuel Larsen, Vanessa Lengies

Cast of GLEE

Chris Colfer

Chris Colfer, Lea Michele

Naya Rivera, Dianna Agron, Harry Shum Jr., Mark Salling, Amber Riley

Cory Monteith, Dianna Agron, Mark Salling

Dianna Agron

Dianna Agron, Becca Tobin

Sarah Jessica Parker

Sarah Jessica Parker