A&R – Pete Wentz
Alto Saxophone, Clarinet – David Mann
Arranged By [Orchestra], Conductor [Orchestra] – Rob Mathes
Art Direction [Creative And Art Direction] – Alex Kirzhner, Panic At The Disco*
Booking [For CAA] – Simon Andrew (2)
Booking [UK And Mainland Europe For Primary Talent] – Mark Ngui
Cello – Tony Pleeth*
Contractor [Orchestra] – Isobel Griffiths
Double Bass – Chris Laurence
Engineer [Orechestra Assistant, Abbey Road Studios] – Lewis Jones
Engineer [Orechestra, Abbey Road Studios] – Jonathan Allen
Engineer, Recorded By [Assistant, Studio At The Palms] – Mark Everton Gray*
Engineer, Recorded By [Studio At The Palms] – Claudius Mittendorfer
Guitar [Additional], Keyboards [Additional], Mandolin [Additional], Piano [Acoustic, Additional] – Rob Mathes
Illustration – Alex Kirzhner, Connie Makita, Tanapan Puangpakdee
Legal – Scott Bradford, Esq.*
Lyrics By – Ryan Ross (tracks: 1 to 5, 7 to 11, 13 to 15)
Management – Bob McLynn (2), Crush Management*, Jonathan Daniel, Scott Nagelberg
Management [Business, For Richman Business Management] – Murray Richman, Nathan Richman (tracks:)
Management [Studio Manager, Abbey Road Studios] – Colette Barber
Management [Studio Manager, Studio At The Palms] – Zoe Thrall
Mastered By – Scott Hull (2)
Mixed By – Peter Cobbin
Mixed By [Assistant] – Richard Lancaster
Mixed By [Second Assistant] – Peter Hutchings
Photography By – Jennifer Tzar
Producer – Heartth Rob Mathes*
Tenor Saxophone – Andy Snitzer
Trombone – Mike Davis*
Trumpet, Flugelhorn – Jeff Kievit
Viola – Peter Lale
Violin [1st] – Perry Montague-Mason
Violin [2nd] – Warren Zielinski
Written-By, Performer – Panic At The Disco*