"I am thrilled to announce that the super talented Adam Lambert is joining the cast of Glee this fall," Ryan Murphy tweeted on Wednesday. How's Lambert feel about coming aboard for season five? "I'm so excited!!" And that's basically all we know — there's no actual announcement detailing the scope of the role or the amount of songs Lambert will belt or anything. The onetime American Idol runner-up's acting résumé is next to nonexistent, but he'll probably be fine.