Among many, many others -- the University of Wisconsin, those who attended (although not all for undergrad):
Joan Cusack
Lorraine Hansbury (who wrote "Raisin in the Sun")
bell hooks
Steve Miller (of the Steve Miller Band)
Joyce Carol Oates
Marjorie Kinnan Rawlings (who wrote "The Yearling")
Butch Vig, the music producer
Eudora Welty
Frank Lloyd Wright
Bud Selig
Dick Cheney (LOL, I was surprised to find this out)
Robert M. La Follette
current Wisconsin senators Herb Kohl and Russ Feingold
Tommy Thompson, U.S. secretary of Health and Human Services
Greta Van Susteren
Abraham Maslow (anybody who's studied psych knows the "heirarchy of needs" pyramid
)