Short answers, pulled from the story.
John Williams composed the scores for all nine saga films, as well as a suite and thematic material for Solo: A Star Wars Story and the theme music for the Star Wars: Galaxy's Edge theme parks. Additional composers including Michael Giacchino, Ludwig Göransson, and John Powell wrote music for anthology films and spin-offs.
The first two trilogies were performed by the London Symphony Orchestra, with choral passages by the London Voices chorus. The sequel trilogy was largely performed by the Hollywood Freelance Studio Symphony, with choral contributions from the Los Angeles Master Chorale.
Williams wrote approximately sixty to seventy leitmotifs for the nine saga films. Including themes for Solo and Galaxy's Edge, his total for the franchise reached as many as seventy-one leitmotifs, one of the largest collections of recurring musical themes in the history of film music.
The 1977 Star Wars soundtrack won the Academy Award for Best Original Score, the Golden Globe for Best Original Score, the BAFTA for Best Film Music, and multiple Grammy Awards. In 2005, the American Film Institute voted it the most memorable film score of all time, based on assessments from over five hundred industry professionals.
Natalie Holt composed the score for the Disney+ series Obi-Wan Kenobi in 2022, making her the first woman to score a live-action Star Wars project. John Williams returned to write the main theme for that series, with Holt composing the rest of the score.
A leitmotif is a recurring musical theme associated with a character, object, location, or idea. Williams uses approximately seventeen themes per two-hour film, and the Force Theme alone plays over one hundred times across the series. He does not always use themes in strictly narrative ways; for example, Princess Leia's Theme accompanies the death of Obi-Wan Kenobi in the original film.