Judd Seymore Hirsch (born March 15, 1935) is an American actor 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), and A Beautiful Mind (2001).
Over the course of his career, he has twice won the Primetime Emmy Award for Outstanding Lead Actor in a Comedy Series, has twice won the Tony Award for Best Actor in a Play, and has been nominated for the Academy Award for Best Supporting Actor.