Theron Kay is a Japanese-American composer, orchestrator, and arranger. A versatile artist originally from San Jose, CA, Theron has contributed to a wide array of projects across film, television, and media. His collaborations include companies such as Marvel, Amazon, and Illumination, and his recent works feature additional music for the animated series Jentry Chau vs. The Underworld (composer Brian H. Kim) and Barbie Mysteries: The Great Horse Chase (composer Joy Ngiaw). In 2025, Theron will make his feature film debut with Grace Point, starring John Owen Lowe (Unstable).

Theron has worked alongside acclaimed composers such as Tom Holkenborg (Junkie XL), Michael Kramer, and Patrick Kirst. His experience also extends to the sync and trailer industry, having served as an in-house composer at Eternal Music Group.

He currently resides in Los Angeles with his wife, Kate, and their dachshund, Inu.