Adam Lambert to Join Cast of 'Glee' in Unspecified Role

From one embattled Fox series to another. American Idol Season 8 runner-up Adam Lambert is joining the cast of Glee, Ryan Murphy announced on Twitter Wednesday night.

Tweeted the creator of the Fox musical series:

Since Murphy failed to elaborate on Lambert's role, fans are left guessing as to whether the singer will be joining in a regular or guest star capacity during Season 5 of the series. Lambert wouldn't be the first alum of the reality singing series to join the show — Idol's Season 11 runner-up, Jessica Sanchez, joined the series last season for a short stint.

But one thing's for sure, when it comes to the news about the theatrical Lambert: How in the world did it take this long for the Idol alum to make it on Glee? (And how quickly can we get Lambert to shave the mustache for his role?)