Joker: Folie à Deux (Score from the Original Motion Picture Soundtrack) reteams composer Hildur Guðnadóttir with writer/director/producer Todd Phillips following their collaboration on the latter's 2019 blockbuster Joker, which earned more than $1 billion at the global box office and an Academy Award, Golden Globe, Grammy and BAFTA award for Guðnadóttir. For Phillips, the decision to bring her back to compose the music for Joker: Folie à Deux was an easy one. He had this to say: "There was no version of this film where we weren't calling Hildur to do the score. I think her music is basically the second biggest character in the first film."

Side A
01. It's Showtime Hildur Guðnadóttir 02:49
02. That Dumb Laugh Hildur Guðnadóttir 01:58
03. Same Ol' Joker Hildur Guðnadóttir 01:40
04. The Real You Hildur Guðnadóttir 02:32
05. Back on TV Hildur Guðnadóttir 01:23
06. Buy Me a Drink First? Hildur Guðnadóttir 01:13
07. Trial of the Century Hildur Guðnadóttir 01:01
08. My Mother Had Me Committed Hildur Guðnadóttir 01:32
09. The Saints Hildur Guðnadóttir 01:17

Side B
01. The Other Half Hildur Guðnadóttir 01:42
02. Social Services Hildur Guðnadóttir 01:41
03. Knock Knock Hildur Guðnadóttir 01:38
04. Doppelgänger Hildur Guðnadóttir 02:23 
05. That's All, Folks Hildur Guðnadóttir 00:54
06. Old Neighborhood Hildur Guðnadóttir 01:14
07. Uh Oh, I'm in Trouble Hildur Guðnadóttir 01:34
08. Voices Hildur Guðnadóttir 02:25
09. There Is No Joker Hildur Guðnadóttir 01:49
10. It's All Theater Hildur Guðnadóttir 02:03