Christopher Saint Booth is a musician, director, producer, composer, and occasional actor, primarily in the horror genre.

Booth got his start in the entertainment industry as a musician, along with his twin brother Philip Booth, as the band Who's Who?, supplying original songs for adult films and even appearing in small non-sex roles in the mid 1980s - in the 2020s, this led to the rediscovery of the song "Ulterior Motives", considered a "lost song" of the 80s. A portion of the song had been uploaded to the Internet in the early 2000s with requests for identification and remained of unknown origin for nearly 20 years until it was finally sourced to the adult film Angels Of Passion (1986), performed by Who's Who? and with writing credited to The Brothers, on April 28, 2024. The mystery and subsequent discovery led Booth to release the full song on streaming services where it went on to garner millions of plays on Spotify and YouTube.

Booth's career eventually led to nearly every role behind the camera, from costumes to set design to lighting to writing and directing, continuing to compose music for his films as well. He won Kentucky Filmmaker Of The Year in 2016.