Jagger was very taken by the character of Brigham Young, reacting warmly when his performance was praised by then President of the LDS Church, Heber J. Grant. This led to a careful study of the Mormon faith for Jagger, who was ultimately baptized a member of the faith in 1972. Subsequently, he willed his personal papers and movie memorabilia to the Harold B. Lee library at Brigham Young University.
Spoke with a pronounced "lisp" in real life, every -day speech. This speech characteristic only disappeared in front of the camera.