Rivalry week it is.

In the state of Michigan, that much is clear. Michigan State will travel to Ann Arbor to take on emerging Michigan in what could be the game of the year so far in the B1G.

And right on schedule, the trash talk is well underway. But a couple of former staples of the rivalry decided to put that trash talk to good use.

Former Michigan State running back T.J. Duckett and former Michigan safety Cato June are participating in the “House Divided Challenge.” Whoever raises less money for their respective charity will have to take a picture in the other team’s colors and post it to social media.

Duckett is raising money for New World Flood, which helps flood the world with volunteers. June is raising money for the Jaguar Football Club.

The Spartans and Wolverines will kick off at 3:30 p.m. ET on Saturday.