He'll play U.S. Rep. Wells A. Hutchins, the Ohio congressman who voted to abolish slavery.
The movie is based on Doris Kearns Goodwin's bestselling biography "Team of Rivals."
"Lincoln" begins filming this fall in Virginia. It is expected to be released through Disney's Touchstone in the fourth quarter of 2012.
Spielberg and Kathleen Kennedy are producing.
Deadline first reported the news.