In The Church of Jesus Christ of Latter-day Saints the President and Prophet is always an Apostle, as are the members of the Quorum of the Twelve Apostles.
In The Church of Jesus Christ of Latter-day Saints, Apostle is the highest priesthood office of the Melchizedek Priesthood. The President of the Church and Prophet is always an Apostle, as are the members of the Quorum of the Twelve Apostles.