John Everett Beal is an American composer and conductor known for his work in the American film industry. He has conducted for major recording artists ranging from Olivia Newton-John to Deadmau5, movies in concert such as Star Wars, Toy Story, Home Alone, Rocketman and the Harry Potter series, is the principal conductor of the Hollywood Symphony Orchestra, is considered by the New York Times as the pioneer of original scores for film trailer music, and has composed the music for numerous television series and films.

A trailer is a commercial advertisement, originally for a feature film that is going to be exhibited in the future at a movie theater or cinema. It is a product of creative and technical work.