Featuring the original score composed by Lorne Balfe, the album consisted of 17 tracks released by Paramount Music on the same date as the film, October 11, 2019.

[5] Balfe was hired as he previously worked with the film's producer Jerry Bruckheimer on Geostorm (2017) and 12 Strong (2018), and through his contact, he met Ang Lee during the Christmas of 2018 and introduced him to the team.

[6] During the musical discussions, Lee wanted to focus the emotion between Henry and Jackson ("Junior") which was the hardest one as he spent longer on thinking the themes and writing.

[3] He collaborated with cellist Tina Guo who played music for Gladiator (2000) and Wonder Woman (2017) and had two different cellos: the electric cello for Henry and acoustic for Junior,[3] as "because in one respect, even though Junior is a clone, the point I wanted to make is that he is more real than Henry".

[8] A review from Film Music Central commented "The soundtrack for Gemini Man is adequate and gets the job done, but it’s nothing that will blow you away.