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.
Has appeared in two films about serial killers: Manhunter (1986) and The Hard Way (1991). Manhunter was based on the novel Red Dragon.
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).
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 part in the film The Fugitive (1993). Lang appeared in the remake of the television series "The Fugitive" (2000), as the one-armed man.
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.
Was nominated for Broadway's 1991 Tony Award as best actor in a featured role - play for "The Speed of Darkness.".
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.
Was considered for the role of Rex Van De Camp on "Desperate Housewives" (2004).
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.
He received an honorary degree from Swarthmore College in 2010.