Judd Seymore Hirsch (born March 15, 1935) is an American actor. He is known for playing Alex Rieger on the television comedy series Taxi (1978-1983), John Lacey on the NBC series Dear John (1988-1992), and Alan Eppes on the CBS series Numb3rs (2005-2010). He is also well known for his career in theatre and for his roles in films such as Ordinary People (1980), Running on Empty (1988), Independence Day (1996), A Beautiful Mind (2001), Independence Day: Resurgence (2016), Uncut Gems (2019), and The Fabelmans (2022).

He won two Primetime Emmy Awards for Outstanding Lead Actor in a Comedy Series, two Tony Awards for Best Actor in a Play, the Golden Globe Award for Best Actor - Television Series Musical or Comedy, and was nominated twice for the Academy Award for Best Supporting Actor. The 42-year gap between his first nomination (Ordinary People in 1980) and second (The Fabelmans in 2022) is the longest in history.