Tomas Costanza (born September 2, 1976) is a certified-platinum American record producer, songwriter and composer. He is the founder of Killingsworth Recording Company and co-creator of . Costanza has co-written and produced 12 Billboard number-one albums, collaborated with major artists, and secured more than a thousand licensed music placements across television, film and advertising.
Costanza was born in North Massapequa, New York. He attended the High SchoolÃÂ of Performing Arts, where he studied classical composition with professorsÃÂ from the Juilliard School, and later enrolled at Berklee College of Music beforeÃÂ leaving to pursue a career as a recording artist.
In 1998, Costanza founded the band Flu Thirteen, later renamed Diffuser. The band signed with Hollywood Records in 2000, releasing Injury Loves Melody (2001) and Making the Grade (2003). DiffuserâÂÂs music was featured inàseveral films, including ', Freaky Friday, Confessions of aàTeenage Drama Queen, Mean Girls, and Summer Catch.
The group disbanded in 2003 but reunited in 2007 to release Sincerely, Wasting Away. In 2024, all four original members reunited again to release The Encore,ÃÂ their first studio album in over 20 years.
Following DiffuserâÂÂs initial breakup, Costanza joined Hollywood Records as an A&Ràscout under Bob Cavallo and Jason Jordan while also working as a SevenàPeaks songwriter for Disney. He later served as Head of A&R for ChamberlainàRecords/Universal. In 2003, he founded Killingsworth Recording Company in New York,àwhich expanded to Los Angeles in 2008. Through Killingsworth, Costanza hasàwritten, produced, and licensed music for brands including Apple, Google,àAmazon, Target, Ford, and Galaxy, and for promos on NBC, ABC, CBS, HBO,àShowtime, Netflix, Marvel, WWE, and Call of Duty.
As a producer and songwriter, Costanza has collaborated with Macklemore,àDarren Criss, Rachel Platten, 2 Chainz, Icona Pop, and Trixie Mattel. He has cowritten and produced twelve Billboard 200 number-one albums and ranked among Billboard (magazine) top five sync writers for seven consecutive years (2015âÂÂ2021). His workàhas appeared in shows such as GreyâÂÂs Anatomy, American Horror Story, How toàGet Away with Murder, The Good Wife, Dexter, and RuPaulâÂÂs Drag Race, as well asàeducational and documentary series for CBS, Comedy Central, Disney, Viceland, and Discovery.
Costanza co-created and produced ', which premiered in LosÃÂ Angeles in 2022, returned in 2024, and transferred Off-Broadway to New WorldÃÂ Stages in October 2024. The production ran for seven months and became theÃÂ most nominated Off-Broadway musical of 2024 with 17 nominations including:
In 2025, GLAAD presented the show with a special recognition award at the 36th Annual GLAAD Media Awards for spotlighting the LGBTQ+ community.
In addition to its stage success, a live cast album was recorded during the Off-Broadway run and released on April 25, 2025. Produced by Costanza and LizaàMinnelli, the album reached the top 10 on the Billboard Cast Albums chart.àMinnelli joined the producing team ahead of the showâÂÂs New York openingâÂÂheràfirst time producing a full-length musicalâÂÂand contributed a voiceover cameo inàthe show and on the album.
A London production is planned for 2026.
Costanza is developing Astrologia, co-written withÃÂ Spencer Liff, scheduled for workshops in 2025 and a New York run in 2026.
Beyond his artistic career, Costanza is an advocate for autism awareness andÃÂ partners with The Nicholas Center to support children on the spectrum.