Nelson Smock Riddle Jr. (June 1, 1921 – October 6, 1985 Oradell, NJ) was an American arranger, composer, bandleader and orchestrator whose career stretched from the late 1940s to the mid-1980s. He worked with many vocalists at Capitol Records, including Frank Sinatra, Ella Fitzgerald, Nat King Cole, Judy Garland, Dean Martin, Peggy Lee, Johnny Mathis, Rosemary Clooney and Keely Smith. He scored and arranged music for many films and television shows, earning an Academy Award and three Grammy Awards. He found commercial and critical success with a new generation in the 1980s, in a trio of Platinum albums with Linda Ronstadt.

In 1950, Riddle was hired by composer Les Baxter to write arrangements for a recording session with Nat King Cole; this was one of Riddle’s first associations with Capitol Records. Although one of the songs Riddle had arranged, “Mona Lisa,” soon became the biggest selling single of Cole’s career, the work was credited to Baxter. However, once Cole learned the identity of the arrangement’s creator, he sought out Riddle’s work for other sessions, and thus began a fruitful partnership that furthered the careers of both men at Capitol.

During the same year, Riddle also formed a friendship with Vern Yocum (born George Vernon Yocum), a big band jazz musician (and brother of Pied Piper Clark Yocum) who would transition into music preparation for Frank Sinatra and other entertainers at Capitol Records. A collaboration followed, with Vern becoming Riddle’s “right hand” as copyist and librarian for the next thirty years.