John Billingsley, born on May 20, 1960, in Media,Pennsylvania, is an American actor best known for his role as Dr. Phlox in Star Trek: Enterprise. He has also appeared in The Man from Earth, Out of Time, and 2012.

     Billingsley grew up in Weston, Connecticut, and later attended Bennington College, where he studied theater. After graduating in 1982, he moved to Seattle and co-founded the Book-It Repertory Theatre, which specialized in stage adaptations of literary works.

      His early television career included guest roles in Northern Exposure, The X-Files, and The West Wing. He gained recognition for playing Professor Miles Ballard in The Others before landing his breakout role as Dr. Phlox, the eccentric Denobulan physician aboard the Enterprise NX-01, in Star Trek: Enterprise (2001–2005).

      Beyond Enterprise, Billingsley appeared in Cold Case, Six Feet Under, Prison Break, and CSI: Crime Scene Investigation. He also played Terrence Steadman in Prison Break and had recurring roles in The Nine and True Blood. His film credits include Just Ask My Children (2001), Breathing Hard (2000), and The Man from Earth (2007).

      Billingsley is married to actress Bonita Friedericy, and they have collaborated on several projects. He continues to act in television, film, and theater while engaging with fans at Star Trek conventions.