Nelson Smock Riddle Jr. (June 1, 1921 – October 6, 1985) was an American arranger, composer, bandleader and orchestrator whose career stretched from the late 1940s to the mid-1980s. He worked with many world-famous 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.

Riddle was born in Oradell, New Jersey, the only child of Marie Albertine Riddle and Nelson Smock Riddle, and later moved to nearby Ridgewood. Following his father’s interest in music, he began taking piano lessons at age eight and trombone lessons at age fourteen. He was encouraged to continue his musical pursuits at Ridgewood High School. 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.