Steve JablonskySteve Jablonsky brought in his mentor Hans ZimmerHans Zimmer and the rock band [?] Linkin Park to assist in composing the musical score. The trio collaborated on making a musical score set to the band's song "New Divide."
Hans ZimmerHans Zimmer had previously announced that he would retire from composing for superhero films after Batman v Superman: Dawn of Justice (2016), which featured Wonder Woman's cinematic debut and teamed her up with Batman and Superman, whose films he had already composed scores for. However, he accepted to compose the score for X-Men: Dark Phoenix (2019), and returned to compose for this film.