Adam Lambert Joining Cast Of 'Glee'

Fifth season will feature 'American Idol' alum in as-yet-undetermined role.

Adam Lambert is coming back to the Fox network. No, the perpetual rumors about him joining
 "American Idol" as a judge aren't true. The season eight runner-up has signed up to join the cast of "Glee" for the upcoming fifth season.

Show runner Ryan Murphy announced the news on Wednesday, writing, "I am thrilled to announce that the super talented Adam Lambert is joining the cast of 'Glee' this fall."

Lambert will be the second "Idol" alum to sign up for the show, following in the footsteps of season 11 second-place finisher Jessica Sanchez, who had a two-episode arc last season as rival diva Frida Romero. There was no information at press time about what role Lambert would play and whether he'll be a new series regular or, like Sanchez, have a brief role.

The role is perfect for Lambert, who told the Hollywood Reporter earlier this year that he's a big fan. Before the Murphy invite, Lambert said the show was "so cute" and praised it for really painting, "a picture of what it's like to be an arts kid in high school ... 'Glee' is really irresistible — it's charming." He told the magazine that he'd love to play himself on the show, much as he did on "Pretty Little Liars" last year.

"Glee" has a long track record of sprinkling in guest stars among its regular cast, including story lines involving Britney Spears, Kate Hudson, Sarah Jessica Parker, Neil Patrick Harris, Kristin Chenoweth, Gwyneth Paltrow, Eve, Charice, Molly Shannon, NeNe Leakes, Josh Groban, Ricky Martin, John Stamos, Whoopi Goldberg, Olivia Newton-John, Gloria Estefan, Kathy Griffin, Lindsay Lohan, Jeff Goldblum and Katey Sagal.

"Glee" comes back on September 19, but it's unclear if Lambert will be on board for the first episode.