Russell M. Nelson

Russell Marion Nelson (born September 9, 1924) is the 17th and current President of The Church of Jesus Christ of Latter-day Saints (LDS Church) upon replacing Thomas S. Monson in January 2018. He was a member of the Quorum of the Twelve Apostles of the LDS Church. He is also a known cardiothoracic surgeon. 
Currently, he is the oldest living apostle in the Church. In July 3, 2015, following the death of President Boyd K. Packer, Nelson became President of the Quorum.