Gregory Martin Itzin (April 20, 1948 – July 8, 2022) was an American character actor of film and television best known for his role as U.S. President Charles Logan in the action thriller series 24.

Early life
Itzin was born in Washington, D.C., the son of Evelyn Loretta (née Smith) and Martin Joseph Itzin. When he was in sixth grade, his family moved to Burlington, Wisconsin, where his father was mayor. Itzin originally intended to become a theater actor, receiving training at the American Conservatory Theater in San Francisco. He acted on many stages across the country.