Mahoney's longtime manager, Paul Martino, said Monday that Mahoney died Sunday in Chicago after a brief hospitalization. The cause of death was not immediately announced.
Mahoney played Martin Crane, father of Kelsey Grammer's Frasier and David Hyde Pierce's Niles. The series, a hit spinoff of ``Cheers,'' aired from 1993 to 2004.
Mahoney's recent roles included guest appearances on "Hot in Cleveland" and a 2015 episode of "Foyle's War."
He was in several acclaimed film roles in the 1980s and 1990s, including, "Eight Men Out," "Say Anything...," "In the Line of Fire," "Reality Bites," and "The American President."
The British-born Mahoney made Chicago his adopted hometown.