Albert Arnold "Buddy" Gillespie (October 14, 1899 – May 3, 1978) was an American cinema special effects artist.
He was born on October 14, 1899, in El Paso, Texas. Gillespie joined MGM as a set designer in 1925, a year after it was founded. He was educated at Columbia University and the Arts Students League. His first project was the silent film Ben-Hur: A Tale of the Christ, released that same year. He worked at the studio in various capacities until 1962. In 1936, he became the head of MGM's Special Effects Department.
Gillespie married Nell Hill in 1944. She died in 2000. They had one child, Thomas Scott Gillespie (1944–61). A. Arnold was previously married to aviator Ruth Elder, with whom he had a son, William Trent Gillespie (1940–2008).
He wrote a book, The Wizard of MGM: Memoirs of A. Arnold Gillespie. Gillispie's nickname was "Buddy."
He died on May 3, 1978, in Los Angeles, California.