The first two guests to be announced (and what caused the mid school-day freakout) were Michael Gambon (Dumbledore)
and Robbie Coultrane (Hagrid)
And then it was announced that Evanna Lynch (Luna Lovegood), and James and Oliver Phelps (the Weasley Twins) were going to be there.
But, the announcement of these awesome guests only sparked quite the pickle for my friends and I----to be discussed tomorrow.
What do you think of these special guests?
*Dumbledore, Luna and Twins images via HarryPotter.wikia.com; Hagrid image via wikipedia.com*