Billy Wirth attended Collegiate Prep School in Manhattan and Brown University in Providence, Rhode Island. Discovered by photographer Bruce Weber while at Brown University, he started modeling in New York City in the mid 80s for such magazines as Seventeen, GQ, Interview, and teen magazines. While at Brown he did his first Diet Pepsi Commercial before moving on to television and movies. His first television show was The Equalizer and moved to LA to start an acting career. His first movie was Seven Minutes In Heaven. A year later he was cast as Dwayne, one of the vampires in the hit movie The Lost Boys. He has since has appeared in several movies and TV series, such as Sex and the City, Law and Order: Criminal Intent, Major Crimes, Eternal Code and Chicago P.D., among many others.
Besides acting, he is also serious about writing and directing, and his artwork is showing in many California galleries. Having completed a Short Film, Kismet, in 1999, he moved on to his first full length Independent film, MacArthur Park, for which he was the writer, director and producer. The film was screened at the Sundance Film Festival 2001 (Grand Prize nominee), Taos Talking Picture Festival (Land Grant nominee), and Seattle International Film Festival 2001 as part of the Black Experience in Films.
As a musician, in the early 1990s Billy fronted a rock band in LA called Dust N’Bones, and he works off and on with a band called “The Cronies”.