Joseph Bitner Wirthlin was an American businessman, and member of the Quorum of the Twelve Apostles of The Church of Jesus Christ of Latter-day Saints (LDS Church). He was sustained to the Twelve on October 4, 1986, and ordained an apostle on October 9, 1986, by Thomas S. Monson. As a member of the Quorum of the Twelve, Wirthlin was accepted by the church membership as a prophet, seer, and revelator.