Matt McGrath is an American actor. In 1987, he debuted in the movie Ironweed. His next roles were in the 1990 TV film Appearances and the feature films Pump Up the Volume and Desperate Hours. He next had recurring roles in the television shows My Life and Times and Cruel Doubt. He later appeared in the films Bob Roberts, The Substance of Fire, Colin Fitz Lives!, Lifebreath, and The Impostors. In 1999, he played the role of Lonny in the film Boys Don’t Cry. The following decade, he mostly appeared in television shows and some roles in the movies too. His latest work is as Joseph Hoffman in the HBO miniseries The Undoing.