Riddle's interest in Hollywood and acting started when, as an 11-year-old, he received an autographed picture from silent film star
Billie Dove. Over the next 80 years Riddle added original movie posters, autographed pictures, and letters to the collection. In 2001, Riddle donated his collection of more than 1,700 movie-related items spanning over 70 years to his alma mater, Murray State University in Kentucky. ==Billie Dove friendship==