Graduated from Swarthmore College in Pennsylvania.
Has four children: Noah, Grace, Dan, Lucy.
Has narrated numerous audiobooks and was recently awarded the Audiofile Earphone award.
Shared a house with Billy Campbell in Santa Monica, California before purchasing his own house.
He was nominated for Broadway's 1991 Tony Award as best actor in a featured role - play for "The Speed of Darkness".
Is one of four Crime Story (1986) stars to appear in the Hannibal Lecter trilogy. He starred with Dennis Farina and Bill Smitrovich in Manhunter (1986), and Ted Levine played "Buffalo Bill" in The Silence of the Lambs (1991).
Runs the famed Actors Studio in New York along with Lee Grant, Al Pacino and others.
Has played Colonel Nathan R. Jessep in the hit Broadway show "A Few Good Men". Jack Nicholson enacted the stern, officious "You can't handle the truth!" role when it moved to film starring Tom Cruise and Demi Moore.
Has played Happy, one of Dustin Hoffman's sons, in the acclaimed 1984 Broadway revival of "Death of a Salesman". John Malkovich played the other son, Biff. Next followed the acclaimed TV adaptation of Death of a Salesman (1985), brilliantly directed by Volker Schlöndorff.
Gave special performances of his one-man show "Beyond Glory" which deals with America's greatest war heroes who were awarded the Medal of Honor, for both the U.S. Senate in Washington and the U.S. troops in the Persian Gulf. The show was backed by the National Endowment for the Arts.
He and Julianne Moore have both appeared in separate films from the Hannibal Lecter series: Manhunter (1986) and Hannibal (2001). Julianne Moore also had a small role in the film The Fugitive (1993). Lang appeared in the remake of the television series The Fugitive (2000), as the one-armed man.
Has appeared in two films about serial killers: Manhunter (1986) and The Hard Way (1991). Manhunter was based on the novel Red Dragon.
While many Gettysburg (1993) cast members reprised their roles in the prequel Gods and Generals (2003), Lang was one of several actors (and the most prominent one) to play two different characters. He played George Pickett in "Gettysburg" and General Stonewall Jackson in "Gods and Generals". Even more, he appeared as the keynote speaker at the 2011 ceremonial rededication of Gettsyburg National Cemetery.
Has appeared in two films about historical figures that featured real-life descendants of those characters. In 1993, he appeared in Tombstone (1993), which featured Wyatt Earp a distant cousin of the famous lawman. He later appeared in Gods and Generals (2003), in which Confederate General Robert E. Lee is played by his real-life descendant, Robert Duvall.
He was awarded the 1989 Joseph Jefferson Award for actor in a supporting role in a play for "The Speed of Darkness", at the Goodman Theatre in Chicago, Illinois.
He was nominated for a 2006 Joseph Jefferson Award for actor in a solo performance for "Beyond Glory", at the Goodman Theatre in Chicago, Illinois.
Was considered for the role of Rex Van De Kamp on Desperate Housewives (2004), which went to Steven Culp.
Lives in Kinderhook, New York.
Received an honorary degree from Swarthmore College in 2010.
His father Eugene Lang is a prominent New York City philanthropist who made millions in technology development. He has given away much of it through his acclaimed "I Have a Dream" foundation. Eugene Lang College at the New School for Liberal Arts in Manhattan is named after him.
His parents have been large contributors to Swarthmore College. Their name appears on several buildings, including the Lang Center For Civic and Social Responsibility, the Lang Music Building, and the Eugene and Theresa Lang Performing Arts Center.
Lang has worked with Star Trek (2009) co-stars Zoe Saldana and Rachel Nichols - Saldana in Avatar (2009) and Nichols in Conan the Barbarian (2011).
His parents were both born in New York. His father was from a Jewish family (from Hungary and Germany). His mother was Catholic, of three quarters Irish and one quarter German descent.
Has portrayed important American Civil War leaders of opposing sides in different movies: Confederate General Thomas "Stonewall" Jackson in Gods and Generals (2003) and Union President Abraham Lincoln in To Appomattox (2015).
Stephen's son Noah is a film producer and writer. They have worked together on the films The Monkey's Paw and Sun Belt Express.