Glee is getting a little taste of Girls.

Andrew Rannells is set to guest-star on the series finale of Fox musical comedy.

Glee: Even more familiar faces are returning for the finale

The actor announced his role on Wednesday's episode of The Tonight Show, but refused to divulge any details about his character or whether he'll sing. However, he and Jimmy Fallon performed an amazing duet to serve as Rannells' audition tape:

In addition to his plethora of Broadway credits (Hairspray, Jersey Boys, The Book of Mormon and Hedwig and the Angry Inch), Rannells also has plenty of experience working with Glee co-creator Ryan Murphy. He starred on Murphy's short-lived NBC comedy The New Normal in which he played the showrunner of a successful TV musical series called Sing (a spoof of Glee).

In addition to Rannells, Fox revealed Thursday that Geraldo Rivera will be appearing on the finale. You can read a full list of familiar faces returning for the finale here.

Glee's finale airs March 20 on Fox. Who do you think Rannells is playing?

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