It's the end of an era.
That's because the guest list for the three-part series finale was announced on Friday and they've put together quite the group!
As of now, Simon Cowell, Paula Abdul, and Randy Jackson will be reuniting for a behind-the-scenes special airing Tuesday, April 5, before Jennifer Lopez, Keith Urban, Ryan Seacrest, and Harry Connick, Jr. take back the reigns for the final performance show on Wednesday, April 6.
But they saved the best for last, because Kelly Clarkson, Carrie Underwood, Kellie Pickler, Scotty McCreery, Josh Gracin, Lauren Alaina, Bucky Covington, Danny Gokey, and more surprise guests from Idol's past will be lending their talents for the very last episode of the singing competition!
You can catch Kellie, Carrie, Kelly, and the rest when American Idol bows out Thursday, April 7 at 8 p.m. EST on FOX!
[Image via Lia Toby/Adriana M. Barazza/Judy Eddy/WENN.]