William "Bill" Sage (born April 3, 1962) is an American actor, known primarily for his prolific career in American independent cinema. His career gained momentum through his long-standing collaboration with director Hal Hartley, for whom he became an iconic face in cult films such as *The Unbelievable Truth* (1989), *Trust* (1990), and *Simple Men* (1992). Over the years, Sage has demonstrated remarkable versatility, portraying roles in a wide variety of productions. His most significant performances include roles in *American Psycho* (2000), *Mysterious Skin* (2004), the acclaimed horror film *We Are What We Are* (2013), and the drama *Precious* (2009). Also active in television, he has appeared in series such as *Boardwalk Empire* and *Hap and Leonard*. Although not associated with major individual awards, Sage is recognized by critics as one of the most reliable and distinctive character actors in American cinema, praised for his ability to bring depth to complex and often ambiguous characters.