If by "theophany", you mean actually seeing God, the answer is generally no. Members of the Church (here capitalized as is the custom) in good standing and who are living the commandments of God as they understand it are said to be entitled to divine personal guidance through the Holy Ghost, who "speaks with a still, small voice." Mormon scripture details instances of theophany by Joseph Smith of course, and others during the early days of the Church. It is said that there is no reason one could not have a theophany (a term not generally used in the Church), but it would be rare. Also it would be an extremely sacred experience that one would probably not reveal to many others, if any. It is a belief of the LDS Church (Mormons) that God the father and Jesus Christ are two separate personages and have physical bodies made of "spirit matter," a more refined substance than the matter men are aquainted with. The Holy Ghost on the other hand, though a separate personage, is a spirit. The understanding of this "Godhead" contasts markedly with many other Christian religions, and so is sometimes a point of controversy. Mormons feel that all men should be free to worship "who, when and how they may."