It will be a who's who cast of characters in Ann Arbor, Michigan, for National Signing Day on Wednesday.

You've heard the names, by now, a list headlined by former Michigan quarterback and current NFL star Tom Brady, one-time Michigan baseball signee and former New York Yankees SS Derek Jeter and 1991 Heisman Trophy winner Desmond Howard.

No doubt, non-Michigan fans are rolling their eyes at what they think is Jim Harbaugh's latest gimmick (like this, for example) to make headlines in the never-ending recruiting battle.

But all of the big-time personalities, also including pro wrestling legend Ric Flair, former MLB manager Jim Leyland, former Notre Dame coach Lou Holtz, three-time Super Bowl champion Mike Shanahan and NASCAR driver Brad Keselowski, among others, will be attending for an excellent cause.

The stars will introduce Michigan's latest national signing class, but more importantly they will be in Ann Arbor to raise awareness and funds for the Chad Tough Foundation, honoring Chad Carr, 5, the grandson of former Michigan coach Lloyd Carr and son of former Michigan quarterback Jason Carr who passed away in November after battling a brain cancer called Diffuse Intrinsic Pontine Glioma (DIPG).

h/t: foxsports.com