Jon Hamm to Guest Star on SpongeBob SquarePants as Don Grouper: See What He Might Loo
 

Jon Hamm to Guest Star on SpongeBob SquarePants as Don Grouper: See What He Might Look Like!
Jon Hamm is guest-starring on SpongeBob SquarePants as an ad exec named Don Grouper – see the pic!This article originally appeared on Usmagazine.com: Jon Hamm to Guest Star on SpongeBob SquarePants as Don Grouper: See What He Might Look Like!