 For much of the late 1990s , he lived in Los Angeles and had minor roles . He made his feature film debut in the 1992 science @-@ fiction adventure film The Lost World . McCormack appeared in several television series , including Top Cops , Street Justice , Lonesome Dove : The Series , <unk> , and Ally McBeal . McCormack later gained worldwide recognition for playing Will Truman in the American sitcom Will & Grace , which premiered in September 1998 . His performance earned him a Primetime Emmy Award for Outstanding Lead Actor in a Comedy Series in 2001 . 
