Carolyn Arthur "Biddy" Martin (born 1951) is an American academic, author, and the current President of Amherst College, in Amherst, Massachusetts.Before becoming president at Amherst, she was Chancellor of the University of Wisconsin–Madison, where she assumed office on September 1, 2008, succeeding John D. Wiley. She was the ninth graduate of UW–Madison to serve as its chancellor, and the first alumna to hold that position. She was the university's second female chancellor, after Donna Shalala, and also the university's first openly lesbian chancellor.Before becoming chancellor at the University of Wisconsin-Madison, she was Provost of Cornell University in Ithaca, New York from July 1, 2000 until August 31, 2008. As provost, Martin served as chief academic officer and chief operating officer, providing leadership for deans of Cornell’s 14 colleges and schools, as well as a number of centers and faculty advisory councils. She helped manage the institution’s academic programs, executive budgets, capital budgets and operating plans. Martin worked on Cornell's academic faculty for 15 years prior to her appointment as provost.