"Gleeseason 5 features Adam Lambert as a guest star in 2013. Lea Michele's Instagram featured the singer's first set photo with the cast before the "American Idol" alum debuts in the "A Katy or a Gaga" episode.

According to Hollywood Life, Lea Michele posted the adorable picture of her, Lambert, Naya Rivera, Demi Lovato and Chris Colfer as their charaters in a New York City apartment on her Instagram on Friday.

Michele was so excited that she tweeted about the scene while on set, too.

The five co-stars are reportedly performing Katy Perry's "Rawr" in the photo. Adam plays a character named Starchild, and will make his "Glee" debut on Nov. 7, reported HL.

Colfer revealed that Lambert would be playing his "nemesis" recently, according to the celebrity news site.

"I always wanted to see [my character] Kurt be mean," Colfer said on "Live! With Kelly & Michael."

But Lambert's first episode is not the only one that fans want to see. Many "Gleeks" want to see Lovato's debut on the Oct. 3 episode entitled "Tina in the Sky with Diamonds."

And, of course, fans are looking forward to seeing the Cory Monteith tribute episode, "The Quarterback" on Oct. 10, reported ABC News. During the season premiere, there was no mention of Monteith's character except for a quick scene, where Michele looked at a cell phone picture of Finn Hudson.

Tuning in to see "Glee" also starring Blake Jenner and Melissa Benoist? Let us know in the comments section below!