He’s currently 79 years old. Show will start filming this year and producers indicated that show can last up to 10 years. Not to sound morbid, but if he’s cast then there’s a very real chance he dies before the show ends. Do we really want ANOTHER Dumbledore mid-series recast?

Yes I know it's CGI and body doubles, but it's a clear example of how they can cover it up with clever cutting and editing. I have full confidence they'll be able to do the Order of the Phoenix battle justice with similar methods. Especially with how far these methods have come since even The Hobbit.

We finally have our first look at John Lithgow as Dumbledore in the Harry Potter reboot.

This is the first we’ve seen of the iconic wizard’s new costume, and he looks every bit the part with his striking blue robes and impressive beard.