Teo was born Mateo Justis Briones in Oxford, England while his parents were on tour. His father is the Filipino actor/singer Jon Jon Briones and his mother is an American actress/singer. His sister Isa Briones is also an actress/singer. He moved to Los Angeles at the age of 3 and began acting and modeling at 5. He is a musician, playing guitar, bass and drums. He also does martial arts- XMA, Karate, gymnastics, acrobatics and cinematic marital arts.