John Billingsley (born May 20, 1960) is an American actor, most famous in the role of Doctor Phlox on the television series Star Trek: Enterprise.
Billingsley was born in Media, Pennsylvania and raised in Connecticut. He studied theatre at Bennington College in Vermont before moving to Seattle, Washington. In Seattle, Billingsley helped found Book-It, a theatre company specializing in stage adaptations, and Freehold, an acting studio. In the early 1990s, Billingsley began to appear in minor roles on television and film, and starred in the independent film Breathing Hard (2000). He was cast in the role of Prof. Miles Ballard in the short-lived television series The Others and then as the eccentric alien Doctor Phlox in the fifth Star Trek series, Star Trek: Enterprise. In 2002, he was a guest star in an episode of Stargate SG-1, playing a scientist who is also a Trekkie, "worship[ping] at the altar of Roddenberry". Billingsley currently resides in Los Angeles, California and remains active in theater.