Jeffrey Warren Daniels (born February 19, 1955) is an American actor, musician and playwright whose career includes roles in films, stage productions and on television, for which he has won an Emmy Award and received Golden Globe, Screen Actors Guild and Tony Award nominations.
Making his film debut in Ragtime (1981), Daniels's film credits include Terms of Endearment (1983), Arachnophobia (1990), Gettysburg (1993), Speed (1994), 101 Dalmatians (1996), Fly Away Home (1996), Pleasantville (1998), The Hours (2002), Good Night, and Good Luck (2005), The Lookout (2007), Infamous (2006), Looper (2012), Steve Jobs (2015), and The Martian (2015).
Daniels is also known for playing Harry Dunne in the buddy comedy Dumb and Dumber (1994) and its sequel Dumb and Dumber To (2014). He received Golden Globe Award nominations for Best Actor for his performances in The Purple Rose of Cairo (1985), Something Wild (1986) and The Squid and the Whale (2005).
Daniels has received a number of award nominations for his work on stage, including Tony Award nominations for Best Actor for his roles in the plays God of Carnage and Blackbird. He is the founder and current executive director of the Chelsea, Michigan-based Purple Rose Theatre Company. From 2012 to 2014, Daniels starred as Will McAvoy in the HBO political drama series The Newsroom, for which he won the 2013 Primetime Emmy Award for Outstanding Lead Actor in a Drama Series and received Golden Globe and Screen Actors Guild Award nominations.