Michael Giacchino ( jə-KEE-noh, Italian: [dʒaˈkiːno]; born October 10, 1967) is an American composer of music for film, television, and video games. He has received many accolades for his work, including an Oscar for Up (2009), an Emmy for Lost (2004), and three Grammy Awards.

Giacchino is known for his collaborations with directors J. J. Abrams, Brad Bird, Matt Reeves, Pete Docter, Colin Trevorrow, Jon Watts, Gareth Edwards, Drew Goddard, J. A. Bayona, The Wachowskis, Taika Waititi, and Thomas Bezucha. His film scores include several films from the Mission: Impossible; Jurassic World, Marvel Cinematic Universe, Star Trek reboot series, eight Pixar Animation Studios films, multiple Disney films, Rogue One, The Batman; and several other films. He also composed the score for the video game series Medal of Honor and Call of Duty and the television series Alias, Lost, and Fringe.

In 2018, he ventured into directing, and in 2022 helmed the Marvel Studios Disney+ special Werewolf by Night.